Pair<F, S>

public class Pair<F, S> {
    private F first;

    private S second;
    
    public Pair(F first, S second) {
        this.first = first;
        this.second = second;
    }
    
    public F getFirst() {
        return first;
    }

    public S getSecond() {
        return seconnd;
    }
}