import strformat,strutils,os

for i in 0..999:
  echo fmt"{i:03d}"
  sleep(1)
  if stdin.readLine() == "unlocked": break


# import osproc
# var p = 0
# if execCmdEx("test -f hoge").exitCode == 0:
#   p = execProcess("cat hoge").strip().parseInt()
#   discard execProcess(fmt"echo {p + 1} > hoge")
# else:
#   discard execProcess("echo 0 > hoge")

# # (000 ～ 999)
# if p > 5:
# else:
#   for i in countdown(999,0):
#     echo fmt"{i:03d}"
#     if stdin.readLine() == "unlocked": break