C1231321123223331211111131211113313331333133313223223312221213232311   >>    C123132112322333121111113121111331333133313331322322331222121323231   <<    C1231321123223331211111131211113313331333133313223223312221213232313   >>      C1231321123223331211111131211113313331333133313223223312221213232312   >>