Larger range?

I have note of this issue but with serial number АЪ. Meaning it falls out range for (2): Prefixes АН-АѲ. Issued by the Provisional Government.

(3): Prefixes БА-ГУ. Issued by the R.S.F.S.R.

Is the (2) range larger than mentioned above in that case? Signatures are IPS, YFM₂

No guarantee for complete correctness but these should be the possible letter combinations

(1) АЕ, АЖ, АЗ, АИ, АІ, АК, АЛ, АМ

(2) АН, АО, АП, АР, АС, АТ, АУ, АФ, АХ, АЦ, АЧ, АШ, АЩ, АЪ, АЫ, АЬ, АЭ, АЮ, АЯ, АѢ, АѲ

With the vast majority of Numista users being Latin script users, maybe there should rather be a list then a range (especially with Cyrillic alphabets being reformed around the time so a quick glance at a chart might not yield a correct conclusion).

Here are the 28 letters that were used in the prefixes for the banknotes of this series:

А, Б, В, Г, Д, Е, З, И, К, Л, М, Н, О, П, Р, С, Т, У, Ф, Х, Ц, Ч, Ъ, Ь, Ѣ, Э, Я, θ

It seems I mistook Ф for θ, probably due to alphabet I was using was post-1918 when θ was removed. Then it seems to be in order, but yes confusing for the non-initiated.