for(c=i=2;p=c;print(/.*\S/(s)))for(j in++i%2?c=readline():0,s='',p+c)s+=/\./(p[j-1]+p[j])?'|':' ',s+=i%2&&/\./(p[j]+(c+j)[j])?'___':' '
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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