C11111333133313232233133313331333133112111112113313331312113311211312121   >>    C1111133313331323223313331333133313311211111211331333131211331121131212   <<    C11111333133313232233133313331333133112111112113313331312113311211312123   >>      C11111333133313232233133313331333133112111112113313331312113311211312122   >>