Name that Greek Letter - Hard Version

Nice idea, but impossible to type 60 names in 120 seconds. Occasional problems with the characters too: stigma should have a longer horizontal (it's currently just a sigma). Does digamma account for vau, the alternative name? And some rubric to explain that some letters are conjunct characters and how you want them written would help.

Oh, the character you've called san looks to me more like an archaic mu, where san looks like a Latin M (see e.g. Woodhead _Greek Inscriptions_ pp.15 and 21). Doubtless the similarity led to the san being replaced by sigma.

It is actually very difficult for a Greek to do this quiz because the english writing of the letters is just aweful...