in reply to
Alpha base-26 to base-10...
Wow. I can't believe that nobody else has pointed out the fact that you are *not* using a base 26 system correctly.
In base 26, there will be no single-character representation of the number 26. Just as there is no single-character representation of 10 in base 10, or 2 in binary.
If you want "blank" = 0, a=1, z=26, then you are using base 27.
Believe nothing, no matter where you read it, or who said it - even if
I have said it - unless it agrees with your own reason and your own