Write the binary series of even chars into a string of [ and ]
[[][[[][[]
choose a part(can be always from somewhere to the end) and reverse so that cnt([) = cnt(])
[[][ ]][]][
choose a point spliting the string into 2 part and swap
[[[][]][]]
turn the 3rd+ [] into (), so that if Array/Function.prototype[any] is function it's called
[[[][]][]]
turn [x][] into +[x] and [x][][] to [x]+[], [x][][][] into [x]+[[]], etc
[ +[ +[]]]
