C123132112322333121111113121111331333133313231333232323223121211   >>    C12313211232233312111111312111133133313331323133323232322312121   <<    C123132112322333121111113121111331333133313231333232323223121213   >>      C123132112322333121111113121111331333133313231333232323223121212   >>