Count Beers

using System;
class Program
{
    static void Main()
    {

        string line = Console.ReadLine();

        int beerCount = 0;

        while (line != "End")
        {
            string[] data = line.Split(' ');
            int count = int.Parse(data[0]);
            string type = data[1];
            if (type == "beers") { beerCount += count; }
            else if (type == "stacks") { beerCount += count * 20; }

            line = Console.ReadLine();
        }
        int totalStacks = beerCount / 20;
        int leftBeers = beerCount % 20;


        Console.WriteLine("{0} stacks + {1} beers", totalStacks, leftBeers);


    }
}