import javax.swing.*;
import java.lang.reflect.Array;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

public class das {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String input = scan.nextLine();

        LinkedHashMap<String, ArrayList<Double>> items = new LinkedHashMap<>();

        while (!input.equals("buy")){

            String[] tokens = input.split("\\s+");
            String name = tokens[0];
            double price = Double.parseDouble(tokens[1]);
            double count = Integer.parseInt(tokens[2]);

            if (items.containsKey(name)){
                ArrayList<Double> ceni = items.get(name);
                double novaCena = ceni.get(1);
                ceni.remove(0);
                ceni.add(0, price);
                ceni.remove(1);
                ceni.add(1, novaCena + count);
                items.put(name, new ArrayList<>());
                items.put(name, ceni);
            }else {
                items.putIfAbsent(name, new ArrayList<>());

                items.get(name).add(price);
                items.get(name).add(count);
            }

            input = scan.nextLine();

        }


        items
                .entrySet()
                .stream()
                .forEach(e -> System.out.printf("%s -> %.2f%n", e.getKey(), e.getValue()));
    }
}