C12313211232233312111111312111133133313331333132232233122213331   >>    C1231321123223331211111131211113313331333133313223223312221333   <<    C12313211232233312111111312111133133313331333132232233122213333   >>      C12313211232233312111111312111133133313331333132232233122213332   >>