Last two pairs, diagonal
Step 1 / 8
L2: Left face: turn 180°
Ten pairs are done. The upper piece of the front right edge pairs with the lower piece of the front left edge, and the other way round.
The two unpaired edges are at the front right and front left. The algorithm ends with Dw2 to put the centers back.
Step 1 of 8: L2. Left face: turn 180°