input: Write a function that will take two strings and return true if the first string contains the second.
  def check_contains(query, word): 
      if query.find(word) != -1:
          return True
      return False
  
  assert check_contains("catering", "cat")==True
  assert check_contains("catering", "ing")==True
  assert check_contains("catering", "zoo")==False
  assert check_contains("catering", "r")==True
  assert check_contains("catering", "")==True
output: def check_contains(query, word): 
      if query.find(word) != -1:
          return True
      return False