Firebase values are small and large

Hello, I save firebase value, then I get the value and give a warning if the value is the same as the user entered, but if the user capitalizes or lowers a letter of the same word, it does not give an error.

then use change case of user value as well as firebase value by using the block CHange case

user eg first value in cat1 cesur While the user is going to add cat2, I give a warning if the value is the same, but the value is for example Cesur Or cesuR If I enter a value similar to these, it does not give a warning, how can I do that?

If anyone has the same problem as me, here is the solution: first of all, when while hiding data to firebase, I use the “capital letter” block and save the data as uppercase and I am comparing User’s text using uppercase block

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