EIN (00-0000000 or 0-0000000) representation

[smblee]

This might be a noob question but im having hard time getting EIN input to work. I am trying to allow either 00-0000000 or 0-0000000 to work (with dash automatically added), but the latter is never getting picked up, unless I explicitly draw the dash.

Naive way of thinking about this would be mask: '0[0]-0000000'.

Ideal way would be getting something like this following regex to work for a very strict EIN check (https://www.regextester.com/108957), but its not necessary.

[uNmAnNeR]

you can use dynamic mask