'use strict';

function Main(input) {
  const N = Number(input.split("\n")[0]);
  if(N === 1) {
    console.log("Hello World");
  }
  if(N === 2) {
    const A = Number(input.split("\n")[1]);
    const B = Number(input.split("\n")[2]);
    console.log(A + B);
  }

};

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