C12313211232233312111111312111133133313331323133313331122332321122221123121231   >>    C1231321123223331211111131211113313331333132313331333112233232112222112312123   <<    C12313211232233312111111312111133133313331323133313331122332321122221123121233   >>      C12313211232233312111111312111133133313331323133313331122332321122221123121232   >>