I would like to give some feedback about ...

From: http://www.checkio.org/mission/three-words/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0

Launches not existing check! Your result: false one two 3 four five six 7 eight 9 ten eleven 12 Right result: true Fail: checkio("one two 3 four five six 7 eight 9 ten eleven 12")