Racers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace Race
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, int> racers = Console.ReadLine().Split(", ", StringSplitOptions.RemoveEmptyEntries).ToDictionary(x => x, x => 0);

            Regex nameRegex = new Regex(@"[A-Za-z]+");
            Regex digitRegex = new Regex(@"\d");

            while (true)
            {
                string line = Console.ReadLine();
                if(line == "end of race")
                {
                    break;
                }

                MatchCollection letterMatches = nameRegex.Matches(line);
                MatchCollection digitMatches = digitRegex.Matches(line);
                string name = GetName(letterMatches);
                int sum = GetSum(digitMatches);
                if (!racers.ContainsKey(name))
                {
                    continue;
                }

                racers[name] += sum;
            }

            string[] winners = racers.OrderByDescending(r => r.Value).Take(3).Select(r => r.Key).ToArray();
            Console.WriteLine("1st place: " + winners[0]);
            Console.WriteLine("2nd place: " + winners[1]);
            Console.WriteLine("3rd place: " + winners[2]);
        }

        private static int GetSum(MatchCollection digitMatches)
        {
            int sum = 0;
            foreach(Match match in digitMatches)
            {
                sum += int.Parse(match.Value);
            }
            return sum;
        }

        private static string GetName(MatchCollection matches)
        {
            StringBuilder sb = new StringBuilder();
            foreach (Match match in matches)
            {
                sb.Append(match.Value);
            }
            return sb.ToString();
        }
    }
}