<oerjan> addquote <shachaf> int-e: Do you like this? <int-e> It depends on the context. In the context of "Do you like _?", I hate it.

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