C12313211232233312111111312111133133313331323133313331122332321122232213331   >>    C1231321123223331211111131211113313331333132313331333112233232112223221333   <<    C12313211232233312111111312111133133313331323133313331122332321122232213333   >>      C12313211232233312111111312111133133313331323133313331122332321122232213332   >>