import sys
sys.setrecursionlimit(10**7)
def ii(): return int(input())
def ist(): return input().split()
def mi(d=0): return map(lambda x:int(x)-d,input().split())
def lmi(d=0): return list(map(lambda x:int(x)-d,input().split()))
INF = float("inf")
def answer(s):
  print(s)
  exit()
def cross(xy):
  x,y = xy
  return (x+1,y),(x-1,y),(x,y+1),(x,y-1)
################################################
print("Hello World!")