fun main(args: Array<String>) {
    val N = readInputLine().toInt()
    
    if (N == 1) {
        println("Hello World")
    } else {
        val A = readInputLine().toInt()
        val B = readInputLine().toInt()
        println(A + B)
    }
}

fun readInputLine(): String {
    return readLine()!!
}
