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  1. Please read the rules
    1.1 You don't have to post the solution as a comment
    1.2 You should not use functions like split and join.. You need to work on the array to exchange the position of the letters

The payout will be in 7 days.
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I edited the post adding the code to work the solution in javascript:
https://pastebin.com/QcP0snbK
You can use this as a starting point

Thanks. My bad for the mishap.

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