def shuffle(r):
    import random
    for i in range(random.randint(17, 32)):
        random.choice([right_c(r), left_c(r), up_c(r), down_c(r), front_c(r), back_c(r), back_ac(r), right_ac(r), left_ac(r), up_ac(r), front_ac(r), down_ac(r)])
    return r
def shuffle(r):
    import random
    for i in range(random.randint(17, 32)):
        random.choice([right_c(r), left_c(r), up_c(r), down_c(r), front_c(r), back_c(r), back_ac(r), right_ac(r), left_ac(r), up_ac(r), front_ac(r), down_ac(r)])
    return r