C12313211232233312111111312111133133313331333132232233122313221111   >>    C1231321123223331211111131211113313331333133313223223312231322111   <<    C12313211232233312111111312111133133313331333132232233122313221113   >>      C12313211232233312111111312111133133313331333132232233122313221112   >>