public class NestedLoop
{
  public static void main(String[] args)
  {
    for(int i = 0; i <= 3; i++)
    {
      for(int j = 0; j <= 2; j++)
      {
        System.out.println(i + " " + j);
        System.out.println("---end of inner loop iteration---");

      }
      System.out.println("---end of outer loop iteration---");
    }
  }
}