C12313211232233312111111312111133133313331323133313331122332321232112322321   >>    C1231321123223331211111131211113313331333132313331333112233232123211232232   <<    C12313211232233312111111312111133133313331323133313331122332321232112322323   >>      C12313211232233312111111312111133133313331323133313331122332321232112322322   >>