Уникални PIN кодове

def is_prime(n):
    if n < 2:
        return False
    for i in range(2, int(n ** 0.5) + 1):
        if n % i == 0:
            return False
    return True


def generate_pins():
    upper_limit_1 = int(input())
    upper_limit_2 = int(input())
    upper_limit_3 = int(input())

    pins = []

    for digit1 in range(2, upper_limit_1 + 1, 2):
        for digit2 in range(2, upper_limit_2 + 1):
            if is_prime(digit2):
                for digit3 in range(2, upper_limit_3 + 1, 2):
                    pin = str(digit1) + str(digit2) + str(digit3)
                    pins.append(pin)

    return pins


pins = generate_pins()

for pin in pins:
    print(" ".join(pin))