C11111333133313232233133313331333133112111112113313331311331333232132211   >>    C1111133313331323223313331333133313311211111211331333131133133323213221   <<    C11111333133313232233133313331333133112111112113313331311331333232132213   >>      C11111333133313232233133313331333133112111112113313331311331333232132212   >>