<b_jonas> python3 -cn="/hackenv/bin/("; s=open(n).read(); s=s.replace(\' canary\',\' -- "$HACKENV/canary"\'); open(n,"w").write(s); print(s);

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