/* Listing0410.java */

public class Listing0410
{
  public static void main(String[] args)
  {
    int[][] a = { {0},
                  {1,2},
                  {3,4,5},
                  {6,7,8,9}
                 };
    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();
    }
  }
}