C1231321123223331211111131211113313331333133313223223312231322231221   >>    C123132112322333121111113121111331333133313331322322331223132223122   <<    C1231321123223331211111131211113313331333133313223223312231322231223   >>      C1231321123223331211111131211113313331333133313223223312231322231222   >>