来自 金沙js77888 2019-09-05 16:06 的文章
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实际上题目并没有要求一定只有

这个东西也不是新鲜玩意了,很久之前就见过,但是一看到那一大坨代码,实在是提不起一点研究的兴趣。无奈今天碰到这样一道题目,只好决定深入研究一下。

关于上面的题目,有必要多说几句。实际上题目并没有要求一定只有[]() !这六个字符,要求会宽松不少,不过题目描述中并没有说明的很清楚。而且运行环境是node,这样导致并没有window,history,document这些对象。更没有window.atob();和window.atob();这两个函数。总之那道题与我这篇文章并没有多大关系。不过在通过题目之后,就可以看到别人的解决办法。果然有高人只用到6种字符就解决问题了。我虽然通过了,但是用到了其它函数,然后我就开始研究别人的代码了。下面就是我的收获。

最重要的就是得到任意的数字

 []=0;
 ![]=0;
 !![]=1;
 ! []=1;
[] []="";
[]-[]=0;
[] {}="[object Object]";
[]-{}=NaN;
{} {}=NaN; //浏览器中是NaN,但是node环境中则是"[object Object][object Object]"
{}-{}=NaN;
{} []=0;
{}-[]=-0;

得到1之后就可以得到任意数字了

! [] ! [] ! [] ! []=4
!![] !![] !![] !![]=4 //我觉得这种形式更直观些

有些人可能会问123这么大的数字怎么办,难道要写123个。这里有个技巧:

! [] ! [] ! [] ! [] [! [] ! [] ! [] ! [] ! [] ! [] ! [] ! []]="48"
 (! [] ! [] ! [] ! [] [! [] ! [] ! [] ! [] ! [] ! [] ! [] ! []])=48
 !![] [!![] !![]] [!![] !![] !![]]="123"
 ( !![] [!![] !![]] [!![] !![] !![]])=123

上面已经得到所有数字了,接下来想办法得到所有字符。
首先想到的就是如果我有一个字符串s="abcdefg";那么s[0]="a";s[1]="b";就可以得到很多字符了。不过我们必须先得到一个字符串才行。
比较容易想到的几个字符串如下:

!![] []="true";
![] []="false";
[] {}="[object Object]";
!![]/[] []="Infinity";
{}-{} []="NaN";
[]-{} []="NaN";
[][[]] []="undefined";

上面的字符串通过数字下标可以提取出不少字符,但是显然也有不少字符还是得不到。比如m,S等。这时候该constructor出场了。
怎么出场呢?很不巧的是上面的字符串中刚好足够凑出constructor这个字符串,于是我们可以得到:

([])["constructor"] []="function Array() { [native code] }"
(![])["constructor"] []="function Boolean() { [native code] }"
( [])["constructor"] []="function Number() { [native code] }"
([] [])["constructor"] []="function String() { [native code] }"
({})["constructor"] []="function Object() { [native code] }"
([])["constructor"]["constructor"] []="function Function() { [native code] }"

但是字符还是不全啊。。。,这个时候,就有人想歪主意了。不过所有的原则就是转换,例如把数字转为字符,把一个字符转为另一个字符。

第一个办法是window.atob();和window.btoa();这是base64的加密和解密

这个方法是我一开始在网上找到的,后来发现node环境下没有这两个方法,所以只能用下面的方法了,不过字符长度增加很多。

第二个办法是window.escape();和window.unescape();这是html实体的编解码

比如escape("<")的结果是<,取第一个字符得到%;有了%,在加上数字就可以解码出很多字符了,比如:

unescape("!")="!"
unescape("H")="H"
unescape("W")="W"

第三个办法是利用数字进制之间的转换。Number.toString(36);

比如211..toString(31)的结果是6p,再取第二个字符就可以得到p字符了。

下面的代码可以输出"Hello World!",我已经加上注释了,其中用到的技巧都已经在上面列出来了。

//[]["filter"]
[][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]]
//["constructor"]
[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])
[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])
[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] 
(!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])
[ ! [] [ []]] (!![] [])[ ! []]]
//("return unescape")() 这一步得到了unescape函数
((!![] [])[ ! []] (!![] [])[! [] ! [] ! []] (!![] [])[ []] ([][[]] [])[ []] (!![] [])[ ! []] ([][[]] [])[ ! []] ( [![]] [][(![] [])[ []] ([![]] [][[]])
[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ ! []]] ([][[]] [])[ []] ([][[]] [])[ ! []] (!![] [])[! [] ! [] ! []] (![] [])
[! [] ! [] ! []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (![] [])[ ! []] 
( (! [] ! [] [ ! []] [ ! []]))[(!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] 
( ![] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])
[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])
[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] 
([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ []] (!![] [])[ ! []] 
([![]] [][[]])[ ! [] [ []]] ([][[]] [])[ ! []] ( ![] [![]] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])
[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])
[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] 
(!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])
[ ! [] [ []]] (!![] [])[ ! []]])[! [] ! [] [ []]]](! [] ! [] ! [] [ ! []])[ ! []] (!![] [])[! [] ! [] ! []])()
(
//[]["filter"]
[][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]]
//["constructor"]
[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] 
(![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] 
(!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]]
//("return escape")() 这一步得到了escape函数
(
//"return esca"
(!![] [])[ ! []] (!![] [])[! [] ! [] ! []] (!![] [])[ []] ([][[]] [])[ []] (!![] [])[ ! []] 
([][[]] [])[ ! []] ( [![]] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ ! []]] 
(!![] [])[! [] ! [] ! []] (![] [])[! [] ! [] ! []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])
[! [] ! [] ! []] (![] [])[ ! []] 
//211
( (! [] ! [] [ ! []] [ ! []]))
//["toString"]
[
//t
(!![] [])[ []]
//o
 (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]]
//"0function String() { [native code] }"
 ( ![] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])
[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])
[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])
[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] 
(!![] [])[ ! []]])
//["10"] 也就是S,这里有一个技巧,特意在前面加了一个0,这样S的位置就是10了,而不是9
[ ! [] [ []]]
//t
 (!![] [])[ []]
//r
 (!![] [])[ ! []]
//i
 ([![]] [][[]])[ ! [] [ []]]
//n
 ([][[]] [])[ ! []]
//"0falsefunction String() { [native code] }"
 ( ![] [![]] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])
[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] 
(![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] 
(!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])
//["20"]
[! [] ! [] [ []]]
]
//"31"
(! [] ! [] ! [] [ ! []])
//[1] 整个过程其实就是211..toString(31)="6p",然后是"6p"[1]="p"
[ ! []]
//e
 (!![] [])[! [] ! [] ! []]
)()
//`("<")`
(([] [])[([![]] [][[]])[ ! [] [ []]] (!![] [])[ []] (![] [])[ ! []] (![] [])[! [] ! []] ([![]] [][[]])[ ! [] [ []]] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! 
[] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (![] [])[! [] ! [] ! []]]()[ []])
//[0] 上面编码结果<取第一位%
[ []]
//48
 (! [] ! [] ! [] ! [] [! [] ! [] ! [] ! [] ! [] ! [] ! [] ! []]) []
)
//e
 (!![] [])[! [] ! [] ! []]
//ll
 (![] [])[! [] ! []] (![] [])[! [] ! []]
//o
 (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]]
//空格
 ( [![]] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ ! []]]
//[]["filter"]
 [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]]
//["constructor"]
[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])
[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] 
(!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] 
(!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]]
//("return unescape")()
((!![] [])[ ! []] (!![] [])[! [] ! [] ! []] (!![] [])[ []] ([][[]] [])[ []] (!![] [])[ ! []] ([][[]] [])[ ! []] ( [![]] [][(![] [])[ []] 
([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ ! []]] ([][[]] [])[ []] ([][[]] [])[ ! []] (!![] [])[! [] ! [] ! []] 
(![] [])[! [] ! [] ! []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (![] [])[ ! []] 
( (! [] ! [] [ ! []] [ ! []]))[(!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] 
( ![] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] 
([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])
[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] 
(!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])
[ []] (!![] [])[ ! []] ([![]] [][[]])[ ! [] [ []]] ([][[]] [])[ ! []] ( ![] [![]] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])
[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] 
(!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] 
(!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])[! [] ! [] [ []]]](! [] ! [] ! [] [ ! []])[ ! []] (!![] [])[! [] ! [] ! []])()
//W
([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]][([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] 
(!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])
[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])
[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])
[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])
[ ! [] [ []]] (!![] [])[ ! []]]((!![] [])[ ! []] (!![] [])[! [] ! [] ! []] (!![] [])[ []] ([][[]] [])[ []] (!![] [])[ ! []] ([][[]] [])[ ! []] ( [![]] [][(![] [])[ []] ([![]] [][[]])
[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ ! []]] (!![] [])[! [] ! [] ! []] (![] [])[! [] ! [] ! []] ([][(![] [])[ []] ([![]] [][[]])
[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (![] [])[ ! []] ( (! [] ! [] [ ! []] [ ! []]))[(!![] [])[ []] (!![] [][(![] [])
[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ( ![] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])
[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] 
(![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] 
(!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ []] (!![] [])[ ! []] ([![]] [][[]])[ ! [] [ []]] ([][[]] [])[ ! []] 
( ![] [![]] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])
[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])
[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] 
(!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])
[! [] ! [] [ []]]](! [] ! [] ! [] [ ! []])[ ! []] (!![] [])[! [] ! [] ! []])()(([] [])[([![]] [][[]])[ ! [] [ []]] (!![] [])[ []] (![] [])[ ! []] (![] [])[! [] ! []] ([![]] [][[]])
[ ! [] [ []]] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (![] [])[! [] ! [] ! []]]()
[ []])[ []] (! [] ! [] ! [] ! [] ! [] [! [] ! [] ! [] ! [] ! [] ! [] ! []]) [])
//o
 (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]]
//r
 (!![] [])[ ! []]
//l
 (![] [])[! [] ! []]
//d
 ([][[]] [])[! [] ! []]
//[]["filter"]
 [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]]
//["constructor"]
[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])
[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])
[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] 
(!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]]
//("return unescape")()
((!![] [])[ ! []] (!![] [])[! [] ! [] ! []] (!![] [])[ []] ([][[]] [])[ []] (!![] [])[ ! []] ([][[]] [])[ ! []] ( [![]] [][(![] [])
[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ ! []]] ([][[]] [])[ []] ([][[]] [])[ ! []] (!![] [])
[! [] ! [] ! []] (![] [])[! [] ! [] ! []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])
[! [] ! [] ! []] (![] [])[ ! []] ( (! [] ! [] [ ! []] [ ! []]))[(!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ( ![] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] 
(!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])
[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] 
(!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])
[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ []] (!![] [])[ ! []] ([![]] [][[]])[ ! [] [ []]] ([][[]] [])[ ! []] 
( ![] [![]] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])
[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])
[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] 
(!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])
[! [] ! [] [ []]]](! [] ! [] ! [] [ ! []])[ ! []] (!![] [])[! [] ! [] ! []])()
//!
([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] 
(!![] [])[ ! []]][([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] 
([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])
[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] 
(!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]]((!![] [])[ ! []] (!![] [])
[! [] ! [] ! []] (!![] [])[ []] ([][[]] [])[ []] (!![] [])[ ! []] ([][[]] [])[ ! []] ( [![]] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ ! []]] (!![] [])[! [] ! [] ! []] (![] [])[! [] ! [] ! []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] 
(!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (![] [])[ ! []] ( (! [] ! [] [ ! []] [ ! []]))[(!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])
[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ( ![] ([] [])[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])
[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])
[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])
[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ []] (!![] [])[ ! []] ([![]] [][[]])[ ! [] [ []]] ([][[]] [])[ ! []] ( ![] [![]] ([] [])
[([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [][(![] [])[ []] ([![]] [][[]])
[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] ([][[]] [])[ ! []] (![] [])[! [] ! [] ! []] (!![] [])[ []] (!![] [])
[ ! []] ([][[]] [])[ []] ([][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (!![] [])
[ []] (!![] [][(![] [])[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]])[ ! [] [ []]] (!![] [])[ ! []]])[! [] ! [] [ []]]]
(! [] ! [] ! [] [ ! []])[ ! []] (!![] [])[! [] ! [] ! []])()(([] [])[([![]] [][[]])[ ! [] [ []]] (!![] [])[ []] (![] [])[ ! []] (![] [])[! [] ! []] ([![]] [][[]])[ ! [] [ []]] ([][(![] [])
[ []] ([![]] [][[]])[ ! [] [ []]] (![] [])[! [] ! []] (!![] [])[ []] (!![] [])[! [] ! [] ! []] (!![] [])[ ! []]] [])[! [] ! [] ! []] (![] [])[! [] ! [] ! []]]()[ []])[ []] (! [] ! [] [ ! []]) []) 

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