C12313211232233312111111312111133133313331333132232233122233123321   >>    C1231321123223331211111131211113313331333133313223223312223312332   <<    C12313211232233312111111312111133133313331333132232233122233123323   >>      C12313211232233312111111312111133133313331333132232233122233123322   >>