<kspalaiologos> addquote <lf94> kspalaiologos: yes, it\'s much more enjoyable sitting in #esoteric than chiselling 99 bottles of beer into a rock.

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