#!/usr/bin/env python3
import sys
key = [None] * 10
class Done(Exception):
    pass
try:
    for i in range(len(key)):
        best_n = -1
        correct_digit = None
        for j in range(10):
            key[i] = j
            print(''.join([str(c or '0') for c in key]))
            sys.stdout.flush()
            n, result = input().split()
            if result == 'unlocked':
                raise Done
            n = int(n)
            if best_n < n:
                best_n = n
                correct_digit = j
        key[i] = correct_digit
except Done:
    pass