input: Write a python function to collect user input until the word "stop" is entered.
  assert collect_user_input(['hello', 'world', 'stop']) == ['hello', 'world']
  assert collect_user_input(['foo', 'bar', 'baz', 'stop']) == ['foo', 'bar', 'baz']
  assert collect_user_input(['stop']) == []
output: def collect_user_input(inputs):
      result = []
      for input_str in inputs:
          if input_str.lower() == 'stop':
              break
          result.append(input_str)
      return result