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

namespace rekursia_Masha
{
    class Program
    {

        static void Main(string[] args)
        {
            Stopwatch swatch = new Stopwatch();
            swatch.Start();
            chisla();
            swatch.Stop();
            Console.WriteLine(swatch.Elapsed);
        }

        static void chisla(int kod = 65, int kol_vo = 80, int count = 0)
        {

            for (int i = 0; i <= kol_vo; i++)
            {
                Console.Write(Convert.ToChar(kod));
            }
            Console.WriteLine();

            if (count != 25)
            {
                chisla(kod + 1,kol_vo - 2, count + 1);
            }

            else if (kol_vo != 80)
            {
                chisla(kod - 1, kol_vo + 2, count);
            }



        }
    }


}