Letters starting the Textbox must be numbers and last character must be alphabetical

[techVsurya (Viraj)]

How to condition apply to TextBox , Letters starting the Textbox must be numbers and last character must be alphabetical.
Example:-
If i want to enter UTM Zone that must be in the format of 43N, 43P, etc…
Thankyou.

[Boban (Boban Stojmenovic)]

Help in veryfing text of a Text Box

This extension will help: This block: [Screenshot_20190719-000019_Chrome] Use this Pattern: [a-zA-Z]{4}[0-9]{4}[a-zA-Z]{2} Example: https://regex101.com/r/sjaZdt/1

[techVsurya (Viraj)]

Thank you for your suggestion. I tried but couldn’t find how to implement it.

[techVsurya (Viraj)]

Thank you so much.
solved blocks:-

[Boban (Boban Stojmenovic)]

How about this

[0-9]{1,2}[a-zA-Z]{1}

[techVsurya (Viraj)]

@Boban

[0-9]{1,2}[a-zA-Z]{1}

This is what I needed, again thanks a lot.