using System;

​

public class Program

{

    public static void Main()

    {

        int[, ] a = {{0, 2, 4}, {7, 1, 3}, {1, 3, 9}};

        for (int i = 0; i < 3; i++)

        {

            for (int j = 0; j < 3; j++)

            {

                Console.Write(a[i, j] + " ");

            }

        }

​

        Console.WriteLine();

        for (int k = 0; k < 3; k++)

        {

            Console.Write(a[k, k] + " * ");

        }

​

        Console.WriteLine();

        for (int b = 0; b < 3; b++)

        {

            Console.Write(a[b, 3 - 1 - b] + " ");

        }

​

        Console.WriteLine();

        for (int c = 0; c < 3 - 1; c++)

        {

            for (int d = 0; d < 3 - 1 - c; d++)

            {

                Console.Write(a[c, d] + " ");

            }

        }

    }

}