import std.stdio;
import std.conv;
import std.array;
import std.algorithm;
import std.range;
import std.string;
alias println = writeln;
alias print = write;

int readint() {
  return readln.chomp.to!int;
}

void main() {
  if (readint() == 1) {
    println("Hello World");
  } else {
    println(readint() + readint());
  }
}
