C12313211232233312111111312111133133313331323133313332322321121212121   >>    C1231321123223331211111131211113313331333132313331333232232112121212   <<    C12313211232233312111111312111133133313331323133313332322321121212123   >>      C12313211232233312111111312111133133313331323133313332322321121212122   >>