L R U' L R' B L B U

x y' R z R' r' R r // purple layer (yellow on regular colour scheme)
R r' R' r (*) z' R r' R' r // CLL + U center (derp)
r B' l B' r' l B' l // H perm

(*) and on should have been: z R r' R' r z2 r' R r R'