C11111333133313232233133313331333133112111112113313331311331333133313331212121   >>    C1111133313331323223313331333133313311211111211331333131133133313331333121212   <<    C11111333133313232233133313331333133112111112113313331311331333133313331212123   >>      C11111333133313232233133313331333133112111112113313331311331333133313331212122   >>