def get_len(digit: int):
    count = 0
    while digit != 0:
        digit = digit // 10
        count += 1
    return count

def extract_digits(n: int):
    result = list()
    num_len = get_len(n)
    while n > 0:
        temp = n // 10
        digit = n - 10 * temp
        n = temp
        result.append(digit)
    return result

def generate(digits, digit_len):
    res = list()
    count_zeroes = 0
    for i in digits:
        if i == 0:
            count_zeroes += 1
    for i in range(1, digit_len):
        for num in digits:
            if num == 0:
                continue
            else:
                for num1 in digits:
                    if num == num1:
                        continue
                    else:
                        _count_zeroes = 0
                        _num = num * (10 ** i) + num1
                        for d in extract_digits(_num):
                            if d == 0:
                                _count_zeroes += 1
                        if num1 == 0 and _count_zeroes > count_zeroes:
                            continue
                        else:
                            if _count_zeroes > count_zeroes:
                                continue
                            res.append(_num)
    return res

def combs(digit: int):
    digit_len = get_len(digit)
    digits = extract_digits(digit)
    res = generate(digits, digit_len)
    print(digits)
    for i in digits:
        if i != 0:
            res.append(i)
    return res