output dollars by llhuii

awk 'n=$0{for(y=0;4>d=int(y/n);){k=(y+1)%n||d>2;printf(d-2?!k*n:n+1)<(q=++x-n-2)?A[x=!++y]RS:q&&q<=n&&d*x-1?x<2||k?FS:"_":"|"}}'

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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