S=sorted while 1: r=raw_input();g=map(set,zip(r,r[2:])[::4]) for x in g: \x09for y in g:y|=x&y and x s=S(map(''.join,map(S,g)),key=len);print s[0],s[-1]
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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