C11111333133313232233133313331333133112111112113313331312111112212131   >>    C1111133313331323223313331333133313311211111211331333131211111221213   <<    C11111333133313232233133313331333133112111112113313331312111112212133   >>      C11111333133313232233133313331333133112111112113313331312111112212132   >>