We use only Cyrillic alphabet (not like the serbians, who use both latin and cyr). And please, don't call it Russian, because it was developed on the balkans and we gave it to the russians
Actually what's the difference between the D1, D2 and D3? Nobody uses D1 and D3 although they are very similiar to the D2.
It's cause odd numbers PISS ME OFF!