import std.stdio;
import std.algorithm;
import std.conv;
import std.numeric;
import std.math;
import std.string;

void main()
{
	auto tokens = split(chomp(readln()));
	auto N = to!ulong(tokens[0]);

	if (N == 1) writeln("Hello World");
	else
	{
		auto a = to!int(chomp(readln()));
		auto b = to!int(chomp(readln()));
		writeln(a + b);
	}

	stdout.flush();
}