Center 2: bring up two pieces
Step 1 / 3
Rw': 2 Right layers: turn 90°, front face goes down
Center 1 is done on the bottom. The top is missing its right column; the front has two pieces in its left column.
Rw' lowers the right column, F2 swaps the two pieces in, Rw raises them. The bottom center stays put.
Step 1 of 3: Rw'. 2 Right layers: turn 90°, front face goes down