Restricting characters in data entry fields

Hello, I'm trying out Articulate to see if it will meet our needs. One thing I need to do is allow learners to enter information in a data entry field, but to restrict what they can enter.  Specifically, I want them only to enter the number 0-9.  No alpha characters, no decimal or other punctuation. Also, only a set number of characters.

Is this possible?

Thanks!

ps - I am not using a 'question' slide for this - it's just a screen capture of a form so they can fill out the fields in any order.  The next slide uses states to show which fields were filled out correctly.