using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var mappers = new string[]

        {

            "Takenyan",

            "BigSlick",

            "Kanahebi",

            "Minato",

            "Yas",

            "Okazu",

        };

​

        var parts = Enumerable

            .Range(0, (int)('W' - 'A'))

            .Select(i => (char)('A' + i));

​

​

        var random = new Random();

        var mapperPool = new List<string>();

        var lastPickedMapper = "";

​

        foreach (var part in parts)

        {

            if (mapperPool.Count == 0)

            {

                mapperPool.AddRange(mappers);

            }

​

            var index = 0;

            string mapper = "";

            do

            {

                index = random.Next(mapperPool.Count);

                mapper = mapperPool[index];

            }

            while (lastPickedMapper == mapper);

​

            mapperPool.RemoveAt(index);

            lastPickedMapper = mapper;

​

            Console.WriteLine("{0}: {1}", part, mapper);

        }

    }

}