import sys

pin = list('0000000000')
print(''.join(pin))
sys.stdout.flush()
match, locked = input().split()
match = int(match)
if locked == 'unlocked':
    exit()
for i in range(10):
    for j in range(1, 10):
        pin[i] = str(j)
        print(''.join(pin))
        sys.stdout.flush()
        m, result = input().split()
        if result == 'unlocked':
            exit()
        if match < int(m):
            match = int(m)
            break
        elif match > int(m):
            pin[i] = str(0)
            break
        else:
            pin[i] = str(0)