using System;

public class Program

{

    public static void Main()

    {

        int[][] arr = new int[4][];

        arr[0] = new int[4] {1,2,3,4};

        arr[1] = new int[2] {5,6};

        arr[2] = new int[3] {7,8,9};

        arr[3] = new int[1] {10};

        for(int i=0; i<4; i++) 

        {

            for(int j=0; j<1; j++)

            {

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

            }

        }

    }   

}