using System;

public class Test
{
	
	// Original string array
	public static readonly string[,] first =
	{
		 {"2", " ", " ", " ", "1"},
		 {"2", " ", "4", "3", " "},
		 {" ", "2", " ", "1", " "},
     	 {" ", "1", " ", "3", " "},
		 {"1", " ", " ", " ", " "}
	};
    	
	public static void Main()
	{
        
    	// Convert
    	int[,] second = new int[first.GetLength(0), first.GetLength(1)];

        for (int j = 0; j < first.GetLength(0); j++)
        {
            for (int i = 0; i < first.GetLength(1); i++)
            {
                int number;
                bool ok = int.TryParse(first[j, i], out number);
                if (ok)
                {
                    second[j, i] = number;
                }
                else
                {
                    second[j, i] = 0;
                }
            }
        }
        
        // Print in console
        for (int i = 0; i < second.GetLength(0); i++)
        {
            for (int j = 0; j < second.GetLength(1); j++)
                Console.Write(second[i, j] + "\t");
            
            Console.WriteLine();
        }
        
        Console.ReadLine();
	}
}