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()))

if n==1:

    print('Hello World')

    exit()

a = int(eval(input()))

b = int(eval(input()))

print((a+b))
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()))
if n == 1:
    print("Hello World")
    exit()
a = int(eval(input()))
b = int(eval(input()))
print((a + b))

-else: -    a = int(eval(input())) -    b = int(eval(input())) -    print((a + b)) +    exit() +a = int(eval(input())) +b = int(eval(input())) +print((a + b))