sens I can't make an account on the computer craft website and I'm banned to make questions on StackOverflow I'm asking to hear

How can I get the first item in the inventory that isn't on a list?

and yes I will try to fix the problem whit StackOverflow

This would have been better as a discussion instead of an issue.

There are new forums: https://forums.computercraft.cc/index.php

Discord is also a thing: https://discord.computercraft.cc/

Also, please work on your spelling, I can understand that it can be difficult if English is not your first language. You might find Grammarly helpful.