public class TestTwoArgs {
    //A
    a;

	//<A1> A1 -> A1
    id(b) {
        var c = b;
        return c;
    }

	//<B extends A> B -> A
    setA(x) {
        a = x;
        return a;
    }
	
	//<C, D extends C> (C,D) -> C 
    m(x,y) {
        x = id(y);
        return x;
    }
    
    //<E, F extends A> (E, F) -> E
    main(x,y) {
    	return m(id(x),setA(y));
    }
}