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Na wejściu Twojej funkcji otrzymasz jedno zdanie. Musisz zwrócić jego poprawną wersję, która rozpoczyna się wielką literą i kończy kropką.

Zwróć uwagę na fakt, że nie wszystkie...

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CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

Install CheckiO Client first:

pip3 install checkio_client

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(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)