public class testarray {
    public static void main(String args[]){
        int a[][] = new int[][]{{1,2},{3,4,5},{6},{7,8,9,10}};
        for(int i = 0; i < a.length; i++){
            for(int j = 0; j < a[i].length; j++)
                System.out.print(" " + a[i][j]);
            System.out.println("");
        }
            
    }
}