n,l;main(c){for(;c;n-l&&printf("\033[4%dm",9-(l=n)),++c&&printf(c<32?"\n":" "))for(c=getchar(n=9);n&&"//wc/b/grx"[n]-c;--n);}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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