# -*- coding: utf-8 -*-
import sys
Klist = [0,0,0,0,0,0,0,0,0,0]
print "".join(map(str, Klist))
sys.stdout.flush()
tmp1, tmp2 = raw_input().split()
tmp1 = int(tmp1)
if tmp2 == "unlocked":
    exit()

for i in range(0, 10):
    for j in range(0, 10):
        Klist[i] = j
        tmp3 = tmp1
        print "".join(map(str, Klist))
        sys.stdout.flush()
        tmp1, tmp2 = raw_input().split()
        tmp1 = int(tmp1)
        if tmp2 == "unlocked":
            exit()
        if tmp3 < tmp1:
            break
        Klist[i] = 0
        if j != 9:
            tmp1 += 1