• Single letter words

I would like to give some feedback about ...

From: https://checkio.org/mission/striped-words/solve/


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The information for the puzzle states that a single letter word is not striped and should be ignored. On the hidden test case:

"To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it?"

The solution says the right answer is 8 striped words, and the word 'a' is highlighted. My solution only generates 7, as I do a len(word) > 1 check. Either the test case is incorrect, or the problem description is incorrect. Please update whichever side you desire.