input: Write a function to determine if the input string contains the word "Hello". If it does, return True; otherwise, return False. If the input string is empty, return False.
  def check_hello(s):
      return 'Hello' in s if s else False
  assert check_hello("Hello, World!")==True
  assert check_hello("World, Hello!")==True
  assert check_hello("Hi, World!")==False
  assert check_hello("World")==False
  assert check_hello("")==False
output: def check_hello(s):
      return 'Hello' in s if s else False