C123132112322333121111113121111331333133313231333133311223323211223211   >>    C12313211232233312111111312111133133313331323133313331122332321122321   <<    C123132112322333121111113121111331333133313231333133311223323211223213   >>      C123132112322333121111113121111331333133313231333133311223323211223212   >>