for first_pos in [0,1,9,4,5,6]: #с нуля до 3 значения будут
    for second_pos in [4,5,6,7,8,9]:
        for third_pos in [2,3,4,6,7,8]:
            for fourth_pos in [3,4,5,6,7,8]:
                pw = f'{first_pos}{second_pos}{third_pos}{fourth_pos}'
                print(pw)
                inp = input()
                if inp == 'yes':
                    break
                elif inp == 'no':
                    continue