import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	static class Foo {
		static void Bar(Ideone one) {
			one.Baz();
		}
	}
	
	private void Baz() {
		System.out.println("Hello, world!");
	}
	
	public static void main (String[] args) throws java.lang.Exception
	{
		Foo.Bar(new Ideone());
	}
}