using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _03.A_Miner_Task
{
    class Program
    {
        static void Main(string[] args)
        {

            string oddPosition = Console.ReadLine();
            int evenPosition = int.Parse(Console.ReadLine());

            Dictionary<string, int> minerTask = new Dictionary<string, int>();





            while (true)
            {



                    if (!minerTask.ContainsKey(oddPosition))
                    {
                        minerTask.Add(oddPosition, 0);

                    }





                minerTask[oddPosition] += evenPosition;




                oddPosition = Console.ReadLine();
                if (oddPosition == "stop")
                {
                    break;
                }

                evenPosition = int.Parse(Console.ReadLine());
            }
            foreach (var item in minerTask)
            {
                Console.WriteLine($"{item.Key} -> {item.Value}");

            }

        }
    }
}