C12313211232233312111111312111133133313331333132232233122311231211331   >>    C1231321123223331211111131211113313331333133313223223312231123121133   <<    C12313211232233312111111312111133133313331333132232233122311231211333   >>      C12313211232233312111111312111133133313331333132232233122311231211332   >>