Feedback from user Jaemu
AttributeError: 'dict' object has no attribute 'iteritems' -- https://docs.python.org/2/library/stdtypes.html#dict.iteritems
URL from: http://www.checkio.org/mission/most-wanted-letter/solve/
HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.116 Safari/537.36
URL from: http://www.checkio.org/mission/most-wanted-letter/solve/
HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.116 Safari/537.36
