C1231321123223331211111131211113313331333133313223223312221311121311   >>    C123132112322333121111113121111331333133313331322322331222131112131   <<    C1231321123223331211111131211113313331333133313223223312221311121313   >>      C1231321123223331211111131211113313331333133313223223312221311121312   >>