using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Input n (>1): ");

        int n = int.Parse(Console.ReadLine());

        Console.WriteLine("Input m: ");

        int m = int.Parse(Console.ReadLine());

        int[,] arr = new int[n,m];

        Random rnd = new Random();

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

        {

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

            {

                arr[i,j] = rnd.Next(1,20);

            }

        }

        Console.WriteLine("Input array: "); 

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

        {

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

            {

                Console.Write(arr[i,j] + "\t");

            }

            Console.WriteLine("\n");

        }

    }

}