Scanner scn = new Scanner(System.in);
        int n = Integer.parseInt(scn.nextLine());

        TreeMap<String, TreeMap<String, Long>> companies = new TreeMap<>();

        for (int i = 0; i < n; i++) {
            String[] line = scn.nextLine().split("\\s+");
            String  company = line[0];
            String nuts = line[1];
            Long amount = Long.parseLong(line[2].replaceAll("kg", ""));

            if (!companies.containsKey(company)) {
                companies.put(company, new TreeMap<>());
            }

            Long count = companies.get(company).get(nuts);
            if (count == null) {
                count = 0l;
            }
            companies.get(company).put(nuts, amount + count);

        }
        System.out.println(companies);