import sys
count = 0
num = ["0"]*10

print("".join(num))
sys.stdout.flush()
s = list(map(str,input().split()))
count = int(s[0])

for i in range(10):
    for j in range(10):
        num[i] = str(j)
        print("".join(num))
        sys.stdout.flush()
        s = list(map(str,input().split()))
        if int(s[0]) == 10:
            exit()
        if int(s[0]) == count:
            continue
        if int(s[0]) > count:
            count = int(s[0])
            break
        if int(s[0]) < count:
            num[i] = str(0)
            break

exit()