N = eval(input())

if N == '1':

    print('Hello World')

else:

    A = int(eval(input()))

    B = int(eval(input()))

    print((A + B))
if eval(input()) == '1':

    print('Hello World')

else:

    print((int(eval(input())) + int(eval(input()))))
N = eval(input())
if N == "1":
    print("Hello World")
else:
    A = int(eval(input()))
    B = int(eval(input()))
    print((A + B))

if eval(input()) == "1":
    print("Hello World")
else:
    print((int(eval(input())) + int(eval(input()))))

-N = eval(input()) -if N == "1": +if eval(input()) == "1": -    A = int(eval(input())) -    B = int(eval(input())) -    print((A + B)) +    print((int(eval(input())) + int(eval(input()))))