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

namespace ConsoleApp35
{
    class Program
    {
        static void Main(string[] args)
        {
            int flight = int.Parse(Console.ReadLine());
            string flightName = "";

            for (int i = 1; i <= flight; i++)
            {
                 flightName = Console.ReadLine();

                int sum = 0;

                int cout = 0;
                while (true)
                {
                    string passengers = Console.ReadLine();
                    if (passengers == "Finish")
                    {
                        break;
                    }

                    else
                    {
                        int number = int.Parse(passengers);
                        cout++;
                        sum += number;
                    }


                }
                Console.WriteLine($"{flightName} : {sum / cout} passengers.");
            }



        }
    }
}