C12313211232233312111111312111133133313331323133313331122332321213232211211311   >>    C1231321123223331211111131211113313331333132313331333112233232121323221121131   <<    C12313211232233312111111312111133133313331323133313331122332321213232211211313   >>      C12313211232233312111111312111133133313331323133313331122332321213232211211312   >>