#!/usr/bin/python3
def puts(arr):
    res = ''.join(map(str, arr))
    print(res, flush=True)
    a, b = input().split()
    return a, b

res = [0] * 10

for i in range(10):
    arr = []
    for j in range(10):
        res[i] = j
        a, b = puts(res)
        if int(a) == 10:
            exit(0)
        arr.append((a, j))
    res[i] = max(arr)[1]