Zeeshan Asif on "Create custom Dynamic field and store in DB Form plugin. Along dynamic number"

Please Help me.

I want to create custom dynamic form field and store it in WordPress DataBase by using DB form plugin. Where User have to submit only 2 alphabets of his Name. and then that information store into database along some dynamic number. LIke ...

First and Last initial Name =>(e.g User will enter) "AZ"

and then That information will display in DB form plugin like that ("AZ253053")

Thanks.