DecryptingMessage

using System;

namespace _05DecryptingMessage
{
    class Program
    {
        static void Main(string[] args)
        {
            var key = int.Parse(Console.ReadLine());
            var n = int.Parse(Console.ReadLine());

            string messages = "";
            char decrypting = ' ';
            for (int i = 1; i <= n; i++)
            {
                string letter = Console.ReadLine();
                decrypting = Convert.ToChar(letter[0] + key);
                messages += decrypting;
            }
            Console.WriteLine($"{messages}");
        }
    }
}