i=input;print((eval(i()+'+'+i())if'1'<i()else'Hello World'))
i=input;print(i()+i()if 1<i()else'Hello World')
i = input
print((eval(i() + "+" + i()) if "1" < i() else "Hello World"))

i = input
print(i() + i() if 1 < i() else "Hello World")

-print((eval(i() + "+" + i()) if "1" < i() else "Hello World")) +print(i() + i() if 1 < i() else "Hello World")