Look at the following classes: 

Public class Ground
{
 Public Ground()
 {
 System.out.println("You are on the ground.");
 }
}
Public class Sky extends Ground
{
 Public Sky()
 {
 System.out.println("You are in the sky.");
 }
}

What will the following program display? 

Public class Checkpoint
{
 Public static void main(String[] args)
 {
 Sky object = new Sky();
 }
}