<oerjan> le/rn speedy gonzales/Sp e e d y G o n z a l e s i s t h e f a s t e s t m o

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