C3123121111113313121111331333133313223313331333133313233313332212121   >>    C312312111111331312111133133313331322331333133313331323331333221212   <<    C3123121111113313121111331333133313223313331333133313233313332212123   >>      C3123121111113313121111331333133313223313331333133313233313332212122   >>