You see on the R-layer that the corners are of the same color. There are five cases with this situation. The edge between them is opposite of the color on those corners. There are three cases like that. Now look at URF and UBR. They are opposite colors. It's down to two cases now. Finally, check UFL and ULB. They are opposite, so you know your case is F(RUR'U')3F'.but if i do: R F (R U R' U')*3 F' R'
i would do R so i have a pseudoblock and then i have the colors already separated, but how should i recognize permutation?