import java.util.*;
import java.lang.*;
 
class Main
{
 
    static class Foo {
        public void foo(String foo) { System.out.println("Foo says: Hello "+foo); }
    }
 
    static class Bar extends Foo {
        @Override
        public void foo(String foo) { this.foo((Object)foo); }
        public void foo(Object foo) { System.out.println("Bar says: Hello "+foo);  }
    }
 
    public static void main (String[] args) throws java.lang.Exception {
        Foo f = new Bar();
        f.foo("world");
    }
}

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