CLL 19 F R U R' U' F' Tags : P CLL 18CLL 20 Alternate AlgorithmsR' U' F R' F' R U R(U2) F U R U' R' F'(U2) R' U' R' F R F' U RF R F' R' U2 R F R' F'(U') R F R F' U' R'SetupF R U R' U' F'Recognition