abcdefijlnorstuy

obfuscated

undefined   = ([][{}]+[])
[object]    = ({}+{})
false       = (!{}+[])
true        = ([]+!!{})
NaN         = ({}-{}+[])
Infinity    = (!!{}/![])

0 = !{}+![]
1 = !!{}+![]
2 = ![]+!!{}+!![]
2 = !!{}+!![]
3 = ![]+!!{}+!!{}+!![]
5 = (!!{}+!![])*(!!{}+!![])+!!{}


o ([]+{}+[])[1]
b ([]+{}+[])[2]
f (!{}+[])[0]
u ([][{}]+[])[0]
s (!{}+[])[3]
c ({}+{})[5]
a ({}-{}+[])[1]
t ([]+!!{})[0]
e ([]+!!{})[3]
d ([][{}]+[])[2]


([]+{}+[])[!!{}+![]]+
([]+{}+[])[!!{}+!![]]+
(!{}+[])[!{}+![]]+
([][{}]+[])[!{}+![]]+
(!{}+[])[![]+!!{}+!!{}+!![]]+
({}+{})[(!!{}+!![])*(!!{}+!![])+!!{}]+
({}-{}+[])[!!{}+![]]+
([]+!!{})[!{}+![]]+
([]+!!{})[![]+!!{}+!!{}+!![]]+
([][{}]+[])[![]+!!{}+!![]]

([]+{}+[])[!!{}+![]]+([]+{}+[])[!!{}+!![]]+(!{}+[])[!{}+![]]+([][{}]+[])[!{}+![]]+(!{}+[])[![]+!!{}+!!{}+!![]]+({}+{})[(!!{}+!![])*(!!{}+!![])+!!{}]+({}-{}+[])[!!{}+![]]+([]+!!{})[!{}+![]]+([]+!!{})[![]+!!{}+!!{}+!![]]+([][{}]+[])[![]+!!{}+!![]]