C12313211232233312111111312111133133313331323133313331122332321122133233311   >>    C1231321123223331211111131211113313331333132313331333112233232112213323331   <<    C12313211232233312111111312111133133313331323133313331122332321122133233313   >>      C12313211232233312111111312111133133313331323133313331122332321122133233312   >>