interface A {
    public String Foo();
    public String Bar();
}

Class B implements A {
    @Override
    public String Bar() {
        System.out.print("Hello from ");
    }

    @Override
    public String Foo() {
        System.out.print("B");
    }
}

Class C implements A {
    @Override
    public String Bar() {
        System.out.print("Hello from ");
    }

    @Override
    public String Foo() {
        System.out.print("C");
    }
}