[vwxwknpy] Bitcoin base 58

Bitcoin uses base 58 to encode addresses: digits, uppercase, lowercase are 62, minus 0 O I l (zero, capital o, capital i, lowercase L).

It could have been more aggressive: 1lI 2Z 5S and the many uppercase and lowercase letter pairs which cannot be distinguished unless you know the scale, e.g., cC oO pP sS vV wW xX zZ. Imagine if hand written address. fF 2Q 17 49Yy 6b DO0 Db B8 g9 kR hb il le nu...