list of latin alpha-numerical codes that are good for identifiers. these have been selected to eliminate confusing with numbering and be easily discernable / communicable verbally.

0 1 2 3 4 5 6 7 8 9 A B E G H K M R S U W X Y Z a b e g h k m r s u w x y z

[TODO: put these into a definition list along with justification for excluded symbols]