C123132112322333121111113121111331333133313231333112331113233221211   >>    C12313211232233312111111312111133133313331323133311233111323322121   <<    C123132112322333121111113121111331333133313231333112331113233221213   >>      C123132112322333121111113121111331333133313231333112331113233221212   >>