Two edges flipped
Step 1 / 8
R': Two layers around the right corner: turns counterclockwise (looking at the right corner)
All three edges are in place, but the top left and top right ones are flipped: green is on the sides.
With the unflipped edge at the back, do it right away; otherwise turn y to bring it back first.
Step 1 of 8: R'. Two layers around the right corner: turns counterclockwise (looking at the right corner)