Scramble

(F R' F' R) U2' (F R' F' R) U' R U' R'

Solutions

R U R' U (R' F R F') U2 (R' F R F')

y2 (F R' F' R)2 r' (U R U' R') U' M'

f (R U R' U') f' U' (R U R' U') (R' F R F')