'use strict';
const input = require('fs').readFileSync('/dev/stdin', 'utf8').split(/\s/);
const N = input[0];
let result;

if (N === '1') {
  result = 'Hello World';
} else { // N === '2'
  const A = Number(input[1]);
  const B = Number(input[2]);
  result = A + B;
}

console.log(result);