Is it an error in this mission?
I would like to give some feedback about ...
From: https://py.checkio.org/mission/long-non-repeat/solve/
HTTP_USER_AGENT:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36
