C12313211232233312111111312111133133313331323221312132221121221   >>    C1231321123223331211111131211113313331333132322131213222112122   <<    C12313211232233312111111312111133133313331323221312132221121223   >>      C12313211232233312111111312111133133313331323221312132221121222   >>