C312312111111331312111133133313331333133313232233133313331333133313331121231121   >>    C31231211111133131211113313331333133313331323223313331333133313331333112123112   <<    C312312111111331312111133133313331333133313232233133313331333133313331121231123   >>      C312312111111331312111133133313331333133313232233133313331333133313331121231122   >>