Ub
Edges Only(M2 U' M) U2 (M' U' M2)
y2 (R' U) (R' U') (R' U') (R' U) R U R2
Setup M2' U M' U2' M U M2' y2
Case 2 of 4 in Edges Only
(M2 U' M) U2 (M' U' M2)
y2 (R' U) (R' U') (R' U') (R' U) R U R2
Setup M2' U M' U2' M U M2' y2
Case 2 of 4 in Edges Only