C31231211111133131211113313331333133112111133132233313223313223121   >>    C3123121111113313121111331333133313311211113313223331322331322312   <<    C31231211111133131211113313331333133112111133132233313223313223123   >>      C31231211111133131211113313331333133112111133132233313223313223122   >>