C12313211232233312111111312111133133313331333132232233122313213231321   >>    C1231321123223331211111131211113313331333133313223223312231321323132   <<    C12313211232233312111111312111133133313331333132232233122313213231323   >>      C12313211232233312111111312111133133313331333132232233122313213231322   >>