// Please note that this is a simple solution. There are other solutions you could create
// For instance, changeState method could automatically change the light dependeing on the current state
// You can create your own solution with your own analysis of the problem!
// If you want to know your solution is acceptable, please show your solution to any TA.

class StopLight
{
	private String state;

	public String getState()
	{
		return state;
	}

	public void setState(String state)
	{
		this.state = state;
	}

	public void changeState(String state)
	{
		setState(state);
	}
}