M=System.in.readLines()*.bytes T=['']*324 i=114 for(s=4;s>0;s=_[s+2]*4-256)T[(_=M[(T[i]?:0)+1])[s+1]%4?i++:i--]=_[s]%8 T.any''.&print
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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