i=lambda:int(eval(input()));print((i()+i()if~-i()else'Hello World'))
print('Hello World'*-~-~-eval(input())or eval(input())+eval(input()))
i = lambda: int(eval(input()))
print((i() + i() if ~-i() else "Hello World"))

print("Hello World" * -~-~-eval(input()) or eval(input()) + eval(input()))

-i = lambda: int(eval(input())) -print((i() + i() if ~-i() else "Hello World")) +print("Hello World" * -~-~-eval(input()) or eval(input()) + eval(input()))