import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author mikit
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        LightScanner in = new LightScanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        No3030 solver = new No3030();
        solver.solve(1, in, out);
        out.close();
    }

    static class No3030 {
        public void solve(int testNumber, LightScanner in, PrintWriter out) {
            out.println("Hello World!");
            //out.println(IntMath.isPrime(in.longs()) ? YES : NO);
        }

    }

    static class LightScanner {
        private BufferedReader reader = null;

        public LightScanner(InputStream in) {
            reader = new BufferedReader(new InputStreamReader(in));
        }

    }
}