import std.stdio, std.conv, std.array, std.string;
import std.algorithm.iteration, std.algorithm.mutation, std.algorithm.searching, std.algorithm.sorting;

void main()
{
    int N = readln().strip.to!int;
    if(N==1)
    {
        writeln("Hello World");
    }else{
        auto r = readln().strip.to!int +
        readln().strip.to!int;
        writeln(r);
    }
}
