import java.util.*

fun main(args: Array<String>) {
    val scn = Scanner(System.`in`)
    val age: Int = scn.nextLine().toInt()

    if (age == 1) {
        println("Hello World")
    } else {
        val numberOne: Int = scn.nextLine().toInt()
        val numberTwo: Int = scn.nextLine().toInt()
        println(numberOne + numberTwo)
    }

}