Yeah, that's a hard-to-address problem with any number system like this (for example, most other base-32 systems have this problem, as do Base64 and pretty much

Yeah, that's a hard-to-address problem with any number system like this (for example, most other base-32 systems have this problem, as do Base64 and pretty much everything else using the full alphanumeric range). Aliasing U and V is an attempt to do the same for a different case (addressing e.g. decimal numbers 519571 and 421594). If I didn't have as strong of a want for a power-of-2 radix I'd have aliased G/g to 6 (and re-aliased L/l to 1) to further address this. Maybe even aliased B/b to 8, since sometimes that's a source of readability issues (and it further mitigates 11594129).