import java.util.*;
import java.lang.*;
import java.io.*;
 
class Ideone
{
	class Parent {
		public Parent() {
			System.out.println("Greetings, underlings!");
		}
	}
 
	class Child extends Parent {
		public Child() {
			this("Hi single-arg child!");
			System.out.println("This is no-arg child");
		}
 
		public Child(String sayHi) {
			System.out.println(sayHi);
			System.out.println("This is single-arg child");
		}
	}
 
	public static void main (String[] args) throws java.lang.Exception
	{
		Ideone one = new Ideone();
		Child c = one.new Child();
	}
}

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