C12313211232233312111111312111133133313331323133313331122332321223111212111   >>    C1231321123223331211111131211113313331333132313331333112233232122311121211   <<    C12313211232233312111111312111133133313331323133313331122332321223111212113   >>      C12313211232233312111111312111133133313331323133313331122332321223111212112   >>