TDM
Legend
You could setup with M' too; the last M' would cancel with undoing the setup, so you start with an M2, and finish on the U before the last M'. No awkward M moves, and no rotations.x ((M' U)3 M') U2 ((M' U)3 M') x'. There are shorter and faster, but this one is okay and is the easiest to remember I think. The first and last sequence of moves is the same.