C1231321123223331211111131211113313331333133313223223312223313121321   >>    C123132112322333121111113121111331333133313331322322331222331312132   <<    C1231321123223331211111131211113313331333133313223223312223313121323   >>      C1231321123223331211111131211113313331333133313223223312223313121322   >>