C12313211232233312111111312111133133313331333132232233122213323231   >>    C1231321123223331211111131211113313331333133313223223312221332323   <<    C12313211232233312111111312111133133313331333132232233122213323233   >>      C12313211232233312111111312111133133313331333132232233122213323232   >>