def check(code):
    print ''.join(map(str, code))
    s = raw_input().split()
    if s[1][0]=='u': exit(0)
    return int(s[0])
pw = [0]*10
f = check(pw)
i = 0
while 1:
    r = pw[i]
    pw[i] = (r+1)%10
    fn = check(pw)
    if f>fn:
        pw[i] = r
        i += 1
    else:
        f = fn