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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            double value = double.Parse(Console.ReadLine());
            string firstCurrency = Console.ReadLine();
            string secondCurrency = Console.ReadLine();



            if (firstCurrency == "EUR" && secondCurrency == "USD")
            {

            }

            else if (firstCurrency == "EUR" && secondCurrency == "BGN")
            {

            }

            else if (firstCurrency == "EUR" && secondCurrency == "GBP")
            {

            }

            else if (firstCurrency == "BGN" && secondCurrency == "GBP")
            {

            }

            else if (firstCurrency == "BGN" && secondCurrency == "EUR")
            {

            }

            else if (firstCurrency == "BGN" && secondCurrency == "USD")
            {

            }

            else if (firstCurrency == "GBP" && secondCurrency == "USD")
            {

            }

            else if (firstCurrency == "GBP" && secondCurrency == "BGN")
            {

            }

            else if (firstCurrency == "GBP" && secondCurrency == "EUR")
            {

            }
            else if (firstCurrency == "USD" && secondCurrency == "BGN")
            {

            }

            else if (firstCurrency == "USD" && secondCurrency == "GBP")
            {

            }

            else if (firstCurrency == "USD" && secondCurrency == "EUR")
            {

            }

        }
    }
}