How to format regex? : <p>I have this:
<a href="https://regexr.com/3jo8c" rel="nofollow noreferrer">https://regexr.com/3jo8c</a></p>

<p>what i want is to have valid only like this:</p>

<p>from 10,00-  to 10,99
    from 100,00 - to 100,99
     from 1000,00 - to 1000,99</p>

<p>so to have always x,<strong>xx</strong></p>

<p>and so on.
 Any suggestion?</p>
