function main(input) {
  const args = input.split('\n');
  const N = parseInt(args[0], 10);
  
  if (args[0] === '1') {
    console.log('Hello World');
  } else {
    let sum = parseInt(args[1], 10) + parseInt(args[2], 10);
    console.log(sum);
  }
}

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