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")

else:

    print((int(eval(input())) + int(eval(input()))))
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")
else:
    print((int(eval(input())) + int(eval(input()))))

-    a = int(eval(input())) -    b = int(eval(input())) -    print((a + b)) +    print((int(eval(input())) + int(eval(input()))))