OLL 21 algorithm: H, Double Sune, Flip, Cross
OLL (orient the last layer). Group: OCLL (all edges oriented).
OLL 21, H: yellow stickers on the top face: back edge, left edge, centre, right edge, front edge. Yellow stickers on the sides: right face, back, right face, front, left face, back, left face, front.
The diagram shows the cube from above with the front at the bottom and yellow on top.
Algorithm
R U R' U R U' R' U R U2 R'
11 moves.
Other algorithms
R' U' R U' R' U R U' R' U2 Ry R U2 R' U' R U R' U' R U' R'y F R U R' U' R U R' U' R U R' U' F'
Source: www.speedcubedb.com