InfoPath Dev

I have a required ID field that I only want to accept 3 patterns of entry:

• nhxxx
• vendxxxx
• ahsnxxxxa

x represents any character numerical or alphabetical.  I am using 'does not match pattern' with custom pattern of n?h?....

I tried n+h+.... but I get a red dash box regardless if I match or mismatch the requirements.

These should work:

nhxxx = nh[A-Za-z0-9]{3}

vendxxxx = vend[A-Za-z0-9]{4}

ahsnxxxxa = ahsn[A-Za-z0-9]{4}a

 If its any character and not alphanumberical just use a "." instead of of [A-Za-z0-9]{4}. So, four periods instead of that.

Thanks Lockdown that worked; I had the periods there but realized we don't use special characters in account creation.  Also I had "or" instead of "and" which threw me off.