(Python)

Please do NOT solve it by using string or special functions(like max min, divmod), I have to ask the same questions again and again otherwise, thanks for your understanding.

Write a program that displays the output shown below, a) using a a nested loop and b) using a string. Your program should work for any starting value. Sample Runs: 98 65 987 654 6543 65432 654321 9876 98765 987654 9876543 98765432 987654321