using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        foreach (var text in Beers(99))

            Console.WriteLine(text);

    }

    static IEnumerable<string> Beers(int beers)

    {

        var starting = true;

​

        foreach(var beer in Enumerable.Range(0, beers + 1))

        {

            var qty = beers - beer;

            var bottle = qty != 1 ? "bottles" : "bottle";

​

            if (!starting)

            {

                yield return $"{(qty == 0 ? "NO MORE" : qty.ToString())} {bottle} of beer on the wall!{Environment.NewLine}";

            }

​

            if (qty > 0)

            {

                yield return $"{qty} {bottle} of beer on the wall,";

                yield return $"{qty} {bottle} of beer,";

                yield return $"Take one down, pass it around,";

            }

​

            starting = false;

        }

    }

}