Leapfrogging by rolf

while 1:
 s=raw_input();i=0;t=""
 for j in sorted(s):k=s.find(j);k+=k>=i;t+="<>"[k>i]+`k-i`[-1];i=k
 print t

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

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