main :: IO()
main = do
    [n] <- map read.words <$> getLine ::IO [Int]
    if n == 1
        then
            putStrLn("Hello World")
        else do
            [a] <- map read.words <$> getLine ::IO [Int]
            [b] <- map read.words <$> getLine ::IO [Int]
            print(a+b)