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

Class B implements A {
    @Override
    public String Foo() {
        return "Hello from ";
    }

    @Override
    public String Bar() {
        return "B";
    }
}

Class C implements A {
    @Override
    public String Foo() {
        return "Hello from ";
    }

    @Override
    public String Bar() {
        return "C";
    }
}