public class Para<A extends Printable, B extends Printable> implements Printable {
    private A first;

    private B second;

    public Printable getFirst() {
        return first;
    }

    public Printable getSecond() {
        return second;
    }

    public Para(A first, B second) {
        this.first = first;
        this.second = second;
    }

    public void print() {
        System.out.println("I'm a pair");
    }


}