C123132112322333121111113121111331333133313231333133311223323211211123321211   >>    C12313211232233312111111312111133133313331323133313331122332321121112332121   <<    C123132112322333121111113121111331333133313231333133311223323211211123321213   >>      C123132112322333121111113121111331333133313231333133311223323211211123321212   >>