3x3x3

Permute diagonal corners

U L U' R - U2 L' U L - R' U' R U2 - L' U R'

Permute 4 Opposite Edges (top cross):

(M2 U) - (M2 U2) - (M2 U) - M2

Permute 4 Diagonal Edges (top cross):

U' M' - (U M2) (U M2) - U M' - U2 M2