#!ruby -lp0 gsub(/.+ /){$&+(0..8).map{|i|$&[i]<$'[i]?'^':'V'}*' '+' '} gsub(/\d(?=.)/){"#$& #{$&<$'?'<':'>'} "}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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