<oerjan> learn `rlexp <compressed code> is a command for expanding the rle format fungot ^show\'s for brainfuck code but doesn\'t accept as input.

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