package eco;
public class Tuple<X , Y> {
	
	X x;
	Y y;
	
	public Tuple(X x, Y y){
		this.x = x;
		this.y = y;
	}

}

package eco;
public class Tuple<X , Y> {
	
	X x;
	Y y;
	
	public Tuple(X x, Y y) {
		this.x = x;
		this.y = y;
	}

}

Update Tuple.java