class Main
{
  public static void main(String[] args)
  {
    // You should have four separate for loops below
  for(int i = 0; i < 9; i++)
   {
     System.out.print(i);
     System.out.print(", ");
   }

    System.out.println();

   for(int i = 10; i > 0; i--)
   {
     System.out.print(i);
     System.out.print(", ");
   }

    System.out.println();

  for(int i = 30; i > -30; i-=10)
   {
     System.out.print(i);
     System.out.print(", ");
   }

   System.out.println();

   for(int i = 4; i < 80; i+=15)
   {
     System.out.print(i);
     System.out.print(", ");
   }
  }
}