C31231211111133131211113313331333133313332233132313331313223121   >>    C3123121111113313121111331333133313331333223313231333131322312   <<    C31231211111133131211113313331333133313332233132313331313223123   >>      C31231211111133131211113313331333133313332233132313331313223122   >>