import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws Exception {
		new Main();
	}

	public Main() throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line = br.readLine().trim(); //Test
		br.close();

		System.out.println("Hello World!");
	}
}