I have correct result but it is not accepted.
Your result:
{"sophia"}
Right result:
{"sophia"}
From: http://www.checkio.org/mission/friends/solve/
HTTP_USER_AGENT:
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Created at: 2016/02/25 21:20; Updated at: 2016/02/29 20:54