using System;
using System.Collections.Generic;
using System.Linq;

namespace _01.Shellbound
{
    public class Shellbound
    {
        public static void Main()
        {
            string inputLine = Console.ReadLine();
            Dictionary<string, HashSet<int>> regions = new Dictionary<string, HashSet<int>>();

            while (inputLine != "Aggregate")
            {
                string[] tokens = inputLine.Split();

                string region = tokens[0];
                int shell = int.Parse(tokens[1]);

                if (!regions.ContainsKey(region))
                {
                    regions[region] = new HashSet<int>();
                }

                regions[region].Add(shell);

                inputLine = Console.ReadLine();
            }

            foreach (var regionAndShell in regions)
            {
                string region = regionAndShell.Key;
                HashSet<int> shell = regionAndShell.Value;

                Console.WriteLine($"{region} -> {string.Join(", ", shell)} ({Math.Ceiling(shell.Sum() - shell.Average())})");
            }
        }
    }
}