input: Write a function to check if the first string contains the second string. If it does, return True; otherwise, return False.
  def check_contains(query, word):
      if query.find(word) != -1:
          return True
      return False
  
  assert check_contains("catering", "cat") == True
  assert check_contains("catering", "dog") == False
  assert check_contains("catering", "") == True
  assert check_contains("", "cat") == False
output: def check_contains(query, word):
      if query.find(word) != -1:
          return True
      return False