C12313211232233312111111312111133133313331333132232233122212132311   >>    C1231321123223331211111131211113313331333133313223223312221213231   <<    C12313211232233312111111312111133133313331333132232233122212132313   >>      C12313211232233312111111312111133133313331333132232233122212132312   >>