C: U2 M' U2 M'
I: 2 134S 164S' 5 M2
W: M U2 M U2
S: M2 2 S134 S'164 5
1: M2 U' M U2 M U' M' U2 M' U2
2: D' r2 U M2 U' r2 D
A: none
B: R U R' U'
C: special case (see above)
D: L' U' L U
E: x' U L' U'
F: x' U L2 U'
G: x' U L U'
H: u R' u'
I: special case (see above)
J: U R U'
K: buffer
L: U' L' U
M: x' U' R U
N: u R u'
O: x' U' R' U
P: x' U' R2 U
Q: (U R U') (u R u')
R: U' L U
S: special case (see above)
T: U R' U'
U: buffer
V: U R2 U'
W: special case (see above)
X: U' L2 U