N=int(eval(input()))

sum_a=0

if N==1:

    print("Hello World")

else:

    for _ in range(2):

        a=int(eval(input()))

        sum_a+=a

    print(sum_a)

N = int(eval(input()))

if N == 1:

     print("Hello World")

else:

     A =  int(eval(input()))

     B =  int(eval(input()))

     print((A+B))

     





N = int(eval(input()))
sum_a = 0
if N == 1:
    print("Hello World")
else:
    for _ in range(2):
        a = int(eval(input()))
        sum_a += a
    print(sum_a)

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

-sum_a = 0 -    for _ in range(2): -        a = int(eval(input())) -        sum_a += a -    print(sum_a) +    A = int(eval(input())) +    B = int(eval(input())) +    print((A + B))