<ais523> addquote <fungot> boily: i walked 5 miles to get to http://community.schemewiki.org from there. but it\'s written in a relatively portable style?

#!/usr/bin/python
s=set()
try:
 while True:
  l=raw_input()
  if l not in s:
   s.add(l)
   print(l)
except EOFError:
 pass