C12313211232233312111111312111133133313331323133313331122332321231211322331   >>    C1231321123223331211111131211113313331333132313331333112233232123121132233   <<    C12313211232233312111111312111133133313331323133313331122332321231211322333   >>      C12313211232233312111111312111133133313331323133313331122332321231211322332   >>