# -*- coding: utf-8 -*-
"""
No.304 鍵(1)
https://yukicoder.me/problems/no/304

"""
import sys
from sys import stdin
input = stdin.readline


def main(args):
    for n in range(1000):
        print(str(n).zfill(3), flush=True)
        res = input().strip()
        if res == 'unlocked':
            break

if __name__ == '__main__':
    main(sys.argv[1:])