//TestRaggedArrays.java

import java.util.Random;

public class TestRaggedArrays
{
    public static void main(String args[])
    {
        //Ragged arrays (also called "jagged" arrays)
        //===========================================
        Random rg = new Random();
        int[][] a = new int[4][];
        for (int i=0; i<4; i++)
        {
            a[i] = new int[Math.abs(rg.nextInt()) % 5 + 1];
            for (int j=0; j<a[i].length; j++)
                a[i][j] = Math.abs(rg.nextInt()) % 10;
        }
        for (int i=0; i<4; i++)
        {
            for (int j=0; j<a[i].length; j++)
                System.out.print(a[i][j] + " ");
            System.out.println();
        }
    }
}