C123132112322333121111113121111331333133313231333133332322332211322211   >>    C12313211232233312111111312111133133313331323133313333232233221132221   <<    C123132112322333121111113121111331333133313231333133332322332211322213   >>      C123132112322333121111113121111331333133313231333133332322332211322212   >>