C12313211232233312111111312111133133313331323133313331122332321121211233231   >>    C1231321123223331211111131211113313331333132313331333112233232112121123323   <<    C12313211232233312111111312111133133313331323133313331122332321121211233233   >>      C12313211232233312111111312111133133313331323133313331122332321121211233232   >>