When we send 2 time the same censured word, it'll be censured only the first time.
Other thing, instead of replace "putain" and "PUTAIN", you can make a "ToLowerCase", replace "éèê" to "e", get the index of the word, and replace it into the returned message. It'll be more easy to add word, and if we send "PuTaiN", the word'll be censured.
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