C123132112322333121111113121111331333133313231333133312133311212133132313221221   >>    C12313211232233312111111312111133133313331323133313331213331121213313231322122   <<    C123132112322333121111113121111331333133313231333133312133311212133132313221223   >>      C123132112322333121111113121111331333133313231333133312133311212133132313221222   >>