C12313211232233312111111312111133133313331323133313331122332321231113332322311   >>    C1231321123223331211111131211113313331333132313331333112233232123111333232231   <<    C12313211232233312111111312111133133313331323133313331122332321231113332322313   >>      C12313211232233312111111312111133133313331323133313331122332321231113332322312   >>