import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.atomic.AtomicInteger;

public class kur {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        LinkedHashMap<String, LinkedHashMap<Double,Integer>> list = new LinkedHashMap<>();
        String input = "";
        AtomicInteger oldQuantity = new AtomicInteger();

        while(!"buy".equals(input = sc.nextLine())){
            String[] data = input.split(" ");
            String product = data[0];
            double price = Double.parseDouble(data[1]);
            int quantity = Integer.parseInt(data[2]);

            if (list.containsKey(product)) {

                list.get(product).entrySet().forEach(e -> {
                     oldQuantity.set(e.getValue());
                });

                list.get(product).remove(price);
                list.put(product, new LinkedHashMap<>());
                list.get(product).put(price, oldQuantity.get() + quantity);

            }else {

                list.putIfAbsent(product, new LinkedHashMap<>());
                list.get(product).put(price, quantity);
            }

        }
        list.entrySet().forEach(pair -> {
            System.out.print(pair.getKey() + " -> ");
            pair.getValue().entrySet().forEach(subentry -> {
                System.out.printf("%.2f\n", subentry.getValue() * subentry.getKey());;
            });
            });
    }

}