using System;

using System.Collections.Generic;

using System.Linq;

​

class Tile : IComparable<Tile>, IEquatable<Tile>

{

    public int Number { get; set; }

    public char Color { get; set; }

​

    public int CompareTo(Tile other) {

        var val = this.Color.CompareTo(other.Color);

        return val == 0 ? val : this.Number.CompareTo(other.Number);

    }

​

    public bool Equals(Tile other) {

        return this.Color == other.Color && this.Number == other.Number;

    }

​

    public override string ToString() {

        return string.Format("{0}{1}", Color, Number);

    }

}

​

public class Program

{

    static Random _r = new Random();

​

    public static void Main(string[] args) {

        Console.WriteLine(string.Join(" ", TileBag("PBYR", Enumerable.Range(1, 13)).OrderBy(t => _r.Next()).Take(14)));

    }

​

    static IEnumerable<Tile> TileBag(IEnumerable<char> colors, IEnumerable<int> numbers) {

        foreach (var color in colors)

        {

            foreach (var number in numbers)

            {

                yield return new Tile { Color = color, Number = number };

                yield return new Tile { Color = color, Number = number };

            }

        }

    }

}

​