realized recently that I have aversions & attractions regarding single-letter variable names and single-letter module names. so heres my

capital letter tier list

for use as as single-letter qualified module imports • and also i removed the D and E tiers because i felt like there were too many

Tier	Letters
S	A, S, W, M, Q, V, K
A	L, J, T, G, U
B	O, I, X, Y, R, H, N, Z
C	E, F, P, C, D, B

and also my

lowercase letter tier list

for use as as single-letter variable names

Tier	Letters
S	a, s, t, v, k, p, r, y
A	b, m, n, f, u, w, g, q
B	i, j, o, x, l, h, d
C	e, c, z