(U2) f (R' F' R U) (R U' R' F) f'如果不出意外这个公式应该挺顺手的。
(U') F' f (R' U' R U )F R f'
(U)f R(' F' U' R') (U R f' F)
(U2) (R' U2 R U) (f U R U' f')
(U2) (R' U2 U f )(R U R U') f' & (U2) (R' U2 U f )(R2 f' R' U R )
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