using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var results = new List<Result>

            {

                new Result(58, "A1"),

                new Result(59, "A2"),

                new Result(60, "A3"),

                new Result(61, "A4"),

                new Result(62, "B1"),

                new Result(63, "B2"),

                new Result(64, "B3"),

                new Result(65, "B4"),

                new Result(66, "C1"),

                new Result(67, "C2"),

                new Result(68, "C3"),

                new Result(69, "C4"),

                new Result(70, "D1"),

                new Result(71, "D2"),

                new Result(72, "D3"),

                new Result(73, "D4")

            };

​

            results = results.OrderBy(result => result.Text[1]).ToList();

​

            foreach (var result in results)

            {

                Console.WriteLine(result.Number + " " + result.Text);

            }

        Console.WriteLine("Hello World");

    }

}

​

public class Result

    {

        public int Number { get; private set; }

        public string Text { get; private set; }

​

        public Result(int number, string text)

        {

            Number = number;

            Text = text;

        }

    }