string encryption

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

namespace _02LinqMoreExcercisesStringEncryption
{
    class Program
    {
        static void Main(string[] args)
        {
            int []commands = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int remove = commands[0];
            int take = commands[1];

            List<int> numbers = Console.ReadLine().Split(' ').Select(int.Parse).ToList();
            numbers.RemoveAll(x => x < 65);
            numbers.RemoveAll(x => x > 90);
            numbers.RemoveRange(0, remove);
            numbers.Take(take).ToList();

            List<char>finalstring =numbers.ConvertAll(x => (char)x);

            // finalstring.RemoveRange(0,remove);
            // finalstring.Take(take).ToList();

            Console.WriteLine(string.Join("",finalstring));





        }
    }
}