RegEx on Google Forms: How to make Case Insensitive work?

Good day!

I have been wondering, how to use case insensitive regular expression for a response validation in a form where there are different possible answers?

I have tried:(name1|name2|name3)and it really works, but I want it to be case insensitive.

Is there an easiest way to make it Case Insensitive?I did:

1. [?i(name1|name2|name3)]– it didn't work, and it accepts names that are not in the parenthesis.
2. [?i](name1|name2|name3)– same as what happened to number 1

Any help would be very much appreciated!Have a great day! 😊✨