C123132112322333121111113121111331333133313231333133312133311212133132213232121   >>    C12313211232233312111111312111133133313331323133313331213331121213313221323212   <<    C123132112322333121111113121111331333133313231333133312133311212133132213232123   >>      C123132112322333121111113121111331333133313231333133312133311212133132213232122   >>