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("lamb", "ban")==False
  assert check_contains("heaven", "heaven")==True
  assert check_contains("missing", "mess")==True
  assert check_contains("chain", "")==True
output: def check_contains(query, word): 
      if query.find(word) != -1:
          return True
      return False