It’s possible with classes https://medium.com/@larsenwork/class-based-contextual-positioning-in-monospaced-fonts-cb6b8b9ffe6f#.bmuw3a4xt https://medium.com/@lar

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