[Community Puzzle] Periodic table spelling - Puzzle discussion

Coding Games and Programming Challenges to Code Better

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Created by @Edjy,validated by @21stCenturyPeon,@Remi and @Jnath.
If you have any issues, feel free to ping them.

Thanks for this one.
I get evreything ok exept validator 3. Any clue ?

You may send your code in a private message and I’ll send back what’s wrong.