digits = ['1', '2', '3', '4']
three_digit_numbers = []

for i in range(len(digits)):
    for j in range(len(digits)):
        for k in range(len(digits)):
            if i != j and i != k and j != k:
                number = digits[i] + digits[j] + digits[k]
                three_digit_numbers.append(number)

for number in three_digit_numbers:
    print(number)