import sys

import math

import itertools

import collections

import heapq

import re

import numpy as np



rr = lambda: sys.stdin.readline().rstrip()

rs = lambda: sys.stdin.buffer.readline().split()

ri = lambda: int(sys.stdin.readline())

rm = lambda: list(map(int, sys.stdin.buffer.readline().split()))

rl = lambda: list(map(int, sys.stdin.readline().split()))

inf = float('inf')

mod = 10**9 + 7



if ri() == 1:

  print('Hello World')

  exit()

else:

  print((ri()+ri()))

























import sys



ri = lambda: int(sys.stdin.readline())



if ri() == 1:

  print('Hello World')

  exit()

else:

  print((ri()+ri()))
import sys
import math
import itertools
import collections
import heapq
import re
import numpy as np

rr = lambda: sys.stdin.readline().rstrip()
rs = lambda: sys.stdin.buffer.readline().split()
ri = lambda: int(sys.stdin.readline())
rm = lambda: list(map(int, sys.stdin.buffer.readline().split()))
rl = lambda: list(map(int, sys.stdin.readline().split()))
inf = float("inf")
mod = 10**9 + 7
if ri() == 1:
    print("Hello World")
    exit()
else:
    print((ri() + ri()))

import sys

ri = lambda: int(sys.stdin.readline())
if ri() == 1:
    print("Hello World")
    exit()
else:
    print((ri() + ri()))

-import math -import itertools -import collections -import heapq -import re -import numpy as np -rr = lambda: sys.stdin.readline().rstrip() -rs = lambda: sys.stdin.buffer.readline().split() -rm = lambda: list(map(int, sys.stdin.buffer.readline().split())) -rl = lambda: list(map(int, sys.stdin.readline().split())) -inf = float("inf") -mod = 10**9 + 7