from itertools import product
import sys


def main():
    sys.setrecursionlimit(100000)
    input = lambda: sys.stdin.readline()[:-1]
    for a in product("0123456789", repeat=3):
        print("".join(a), flush=1)
        s = input()
        if s == "unlocked":
            break


if not __debug__:
    f = open(sys.argv[1], "r")
    sys.stdin = f

main()