C12313211232233312111111312111133133313331333132232233122311231223323131   >>    C1231321123223331211111131211113313331333133313223223312231123122332313   <<    C12313211232233312111111312111133133313331333132232233122311231223323133   >>      C12313211232233312111111312111133133313331333132232233122311231223323132   >>