C123132112322333121111113121111331333133313231333232323221222121311   >>    C12313211232233312111111312111133133313331323133323232322122212131   <<    C123132112322333121111113121111331333133313231333232323221222121313   >>      C123132112322333121111113121111331333133313231333232323221222121312   >>