C1231321123223331211111131211113313331333133313223223312232212311   >>    C123132112322333121111113121111331333133313331322322331223221231   <<    C1231321123223331211111131211113313331333133313223223312232212313   >>      C1231321123223331211111131211113313331333133313223223312232212312   >>