"use strict";
function Main(input) {
    let lines = input.split("\n");
    let N = lines.shift().split(/\s/)[0].map((v) => v - 0);
    if (N == 1) {
        console.log("Hello World");
    } else {
        let A = lines.shift().split(/\s/)[0].map((v) => v - 0);
        let B = lines.shift().split(/\s/)[0].map((v) => v - 0);
        console.log(A + B);
    }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
