use std::io::{Read,self};

fn main(){
    let mut buf = String::new();
    io::stdin().read_to_string(&mut buf).unwrap();
    let mut input = buf.split_ascii_whitespace();

    let n:usize = input.next().unwrap().parse().unwrap();
    let m:usize = input.next().unwrap().parse().unwrap();
    
    println!("Hello World!");
    
}