C123132112322333121111113121111331333133313231333222331213221212211   >>    C12313211232233312111111312111133133313331323133322233121322121221   <<    C123132112322333121111113121111331333133313231333222331213221212213   >>      C123132112322333121111113121111331333133313231333222331213221212212   >>