Hotstring with variable parts

Noob here. I recently got AHK for hotstrings for my work. I know how to make a simple one like .email to write out your email, but is it possible to create a hotstring with variable numbers or letters contained within?

Eg - if I input 'l1d3' it could change it to 'Level 1, Diffuclty 3', but the numbers vary as I need them, so it could do l4d5, l2d18, etc etc.