anagram checker

#!/usr/bin/env python
# anagram checker

from collections import defaultdict

d = defaultdict(set)
for i in open('/usr/share/dict/words'):
    i = i.strip().lower()
    if len(i) == 9:
        d[tuple(sorted(i))].add(i)

for k,v in sorted(d.items(), key = lambda (k,v): (len(k), min(v))):
    if len(v) > 2:
        print '\t'.join(v)