C12313211232233312111111312111133133313331323133313331122332321122113223331   >>    C1231321123223331211111131211113313331333132313331333112233232112211322333   <<    C12313211232233312111111312111133133313331323133313331122332321122113223333   >>      C12313211232233312111111312111133133313331323133313331122332321122113223332   >>