/**
 * @author Daniel "3ICE" Berezvai
 */
public class Szia2 {
	public static void main(String[] args) {
		if(args.length!=1){
			System.out.println("Hello guest, please give your last name as a command line argument. (1 word)");
		}else{
			System.out.println("Hello " + args[0]);
		}
	}
}