Added support for `a` and `an`
Added support for `a` and `an`

Something I did through the web interface, so hopefully it works (I didn't have time to test it, more of a concept).

Should think of `a` and `an` as 1
penne12/chrono,jpenna/chrono,adjohnson916/chrono,wanasit/chrono,wanasit/chrono,jpenna/chrono,adjohnson916/chrono,ToshMeston/chrono,ToshMeston/chrono,penne12/chrono