htaccess rule how to remove characters in subdomain?

Question

htaccess

In general, the task is this ....
they changed the engine, and now the old links stopped working
before it was:
dvigatel-b.site.com/12345-bmz24
where the hyphen is stable everywhere, and b is the directory id variable,
12345 is the product Id,

now the site has been put in order, and now it has become
dvigatel.site.com/bmz24/

Now the question arose, how not to lose seo?
everyone addresses that the simplest thing is to correctly configure the redirect in htaccess.

Collective mind appeal to you for help!

Answer 1

Basically the task is...

https://freelance.habr.com/tasks