from itertools import product digits = '0123456789' target = "809" combinations = list(product(digits[1:], digits*4, digits[1:], digits*3, digits*3)) for combo in combinations: num1, num2, num3, num4, num5 = combo num1_str, num2_str, num3_str, num4_str, num5_str = str(num1), str(num2), str(num3), str(num4), str(num5) if num2_str[2:] == target and len(num1_str + num2_str + num3_str + num4_str + num5_str) == 12: print(num1_str + '0') print(num2_str) print(num3_str) print(num4_str) print(num5_str) break