C31231211111133131211113313331333133313331323223313331333133313331312312121   >>    C3123121111113313121111331333133313331333132322331333133313331333131231212   <<    C31231211111133131211113313331333133313331323223313331333133313331312312123   >>      C31231211111133131211113313331333133313331323223313331333133313331312312122   >>