C123132112322333121111113121111331333133313231333231323233221233112211211   >>    C12313211232233312111111312111133133313331323133323132323322123311221121   <<    C123132112322333121111113121111331333133313231333231323233221233112211213   >>      C123132112322333121111113121111331333133313231333231323233221233112211212   >>