C12313211232233312111111312111133133313331323133313333232233231221322333121   >>    C1231321123223331211111131211113313331333132313331333323223323122132233312   <<    C12313211232233312111111312111133133313331323133313333232233231221322333123   >>      C12313211232233312111111312111133133313331323133313333232233231221322333122   >>