Substitute string with right-justified characters.

[Mordasius]

I'd like to edit the following string to replace A with 1, B with 2, etc..

MonthSubstitute="A":" المحرّم","B":"صفر","C":" ربيع الأوّل","D":" ربيع الثاني","E":" جمادى الأولى","F":" جمادى الثانية","G":" رجب","H":" شعبان","I":" رمضان","J":" شوّال","K":" ذو القعدة","L":" ذو الحجّة"

Seems to me that as soon as I start to put numeric characters in the string the whole thing shifts around in an unpredictable manner.