Regex to match exact number : <p>I have a lot of LOC of a project in visual studio and I want to search for every line which uses the numbers 12 and 13. It can't be part of a bigger number, I need to retrieve only the code that actually uses the constants 12 and 13. I think it is possible to do with regex but I'm having a hard time here.</p>

<p>Any help will be very appreciated.</p>
