It’s possible with classes <a href="https:&#x2F;&#x2F;medium.com&#x2F;@larsenwork&#x2F;class-based-contextual-positioning-in-monospaced-fonts-cb6b8b9ffe6f#.bmuw3a4xt" rel="nofollow">https:&#x2F;&#x2F;medium.com&#x2F;@larsenwork&#x2F;class-based-contextual-positi...</a><p>And assume we only support 4-10 digit numbers, it would require e.g. 6 rules or so.<p>But substitutions are done left-to-right, that might be a problem