C12313211232233312111111312111133133313331333132232233122322212113121   >>    C1231321123223331211111131211113313331333133313223223312232221211312   <<    C12313211232233312111111312111133133313331333132232233122322212113123   >>      C12313211232233312111111312111133133313331333132232233122322212113122   >>