02. Ascii Sumator

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

namespace AsciiSumator
{

    class Program
    {
        static void Main()
        {
            char first = char.Parse(Console.ReadLine());
            char last = char.Parse(Console.ReadLine());

            var sum = Console.ReadLine()
                .ToCharArray()
                .Where(x => x > first && x < last)
                .Sum(x => x);

            Console.WriteLine(sum);
        }
    }
}