F permutation algorithm
PLL (permute the last layer). Group: Corners and edges.
F permutation: the top face is yellow all over. The algorithm swaps the front-right corner and the back-right corner, and swaps the front edge and the back edge.
The diagram shows the cube from above with the front at the bottom and yellow on top.
Algorithm
R' U' F' R U R' U' R' F R2 U' R' U' R U R' U R
18 moves.
Other algorithms
R' U R U' R2 F' U' F U R F R' F' R2L R2 U R U R2 U' R' U' R2 U' R U2 L' U R'y R' U' F' R U R' U' R' F R2 U' R' U' R U R' U R
Source: www.speedsolving.com