C11111333133313232233133313331333133112111112113313123232213231   >>    C1111133313331323223313331333133313311211111211331312323221323   <<    C11111333133313232233133313331333133112111112113313123232213233   >>      C11111333133313232233133313331333133112111112113313123232213232   >>