Non-native English-speakers: how do you pronounce 'grass' and 'chance'?

[Roy]

Though as Creoda said on the other thread, many Welsh and Aussies will say 'grass' with a long 'ah' but 'chance' with a short 'a' (although those with more upper-middle class leanings in both countries will often use the long 'ah' in 'chance' as well).

I pronounce them this way too.