# coding:utf-8

def main():
    a = '0000000000'
    print(a)
    score, s = input().split()
    if s == 'unlocked':
        return
    for i in range(10):
        for j in range(10):
            if a[i] == str(j):
                continue
            print(a[:i]+str(j)+a[i+1:])
            score2, s = input().split()
            if s == 'unlocked':
                return
            if int(score) < int(score2):
                a = a[:i]+str(j)+a[i+1:]
                score = score2
                break
            if int(score) > int(score2):
                break

main()