V = U' // 1 move
S = R' // 1 move
G = F' // 1 move
b = U R U R U R // 6 moves
a = b U R U R // 10 moves
i = b b U R // 14 moves
c = V R i i V R // 32 moves
n = V R a // 12 moves
d = n n // 24 moves
e = n c U R // 46 moves
f = U R c a V R // 46 moves
g = n c a b V R // 62 moves
h = n b c a V R // 62 moves
j = c c a V R // 76 moves
k = b b V R // 14 moves
l = n c c // 76 moves
m = n U R // 14 moves
o = V R U R // 4 moves
r = a d c U R e f k n b h a o d c U R f c c n c a b d o d c U R j a b V R d c c f c g d c c f c c V R i c a U R d n V R d l j U R U R e j a o c d c c f c g l c c a d V R d d U R c i V R c j U R c e c m c U R c a d V R d g a b o U R n b e c c a d // 2656 moves
s = n b g a V R d b l i n V R e c k d b c a n b V R m c U R m c i d o U R // 548 moves
t = // ...