I would like to give some feedback about "Even the last" mission

From: http://www.checkio.org/mission/even-last/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko

The same code under Python 2.7 turned out completely differently. Please refer to the screenshot. I don't know how I failed the code.

Thank you