public class Pair<F,S>  {
	F first = null;
	S second = null;
	
	public Pair(F first, S second)
	{
		this.first = first;
		this.second = second;
	}
	
	public F getFirst()
	{
		return first;
	}

	public S getSecond()
	{
		return second;
	}

}