import java.util.Scanner

object Main{
  def main(args: Array[String]): Unit = {
    val scan = new Scanner(System.in)
    val N = scan.nextInt()
    
    if (N == 1) {
      println("Hello World")
    } else {
      val A = scan.nextInt()
      val B = scan.nextInt()
      println(A + B)
    }
  }
}