C12313211232233312111111312111133133313331333132232233122311211113131   >>    C1231321123223331211111131211113313331333133313223223312231121111313   <<    C12313211232233312111111312111133133313331333132232233122311211113133   >>      C12313211232233312111111312111133133313331333132232233122311211113132   >>