using System.Collections;

public class Pair<L, R> {
	private L left;
	private R right;

	public Pair(L _left,R _right){
		left = _left;
		right = _right;
	}
	// not same name , add s.
	public L lefts(){
		return left;
	}

	public R rights(){
		return right;
	}

}