I would like to give some feedback about this task. I think you've made a mistake in third example in answer. Please,check this.
From: https://py.checkio.org/mission/common-words/solve/
HTTP_USER_AGENT:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
Created at: 2017/03/24 15:23; Updated at: 2017/03/25 00:12
