three piece puzzle by hallvabo

while~0:s=raw_input();f=s.count;print"".join(sorted(s.split(),key=lambda(a,b):f(a)-f(b)))

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

To protect the system from spam, please input your favorite sport (hint: I believe its name must start with 'g', case insensitive)

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