"use strict";
function I(s,f){this._s=s.split("\n");this._c=0;this._l=0;this._f=f||Number}I.prototype.a=function(){var l=this._s[this._l];if(!l)return;var t=l.trim().split(" ");var a=t[this._c];this._c++;if(t.length===this._c){this._c=0;this._l++}return this._f(a)};I.prototype.l=function(){var l=this._s[this._l];if(!l)return;this._c=0;this._l++;return l.split(" ").map(this._f)};module.exports=I;

function main(input) {
  const o = new I(input);

  let N = o.a();
  
  if (N === 1) {
    console.log("Hello World");
  }

  if (N===2) {
    let A = o.a();
    let B = o.a();
    console.log(A + B);
  }
}


main(require("fs").readFileSync("/dev/stdin", "utf8"));
