using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var days1 = new[] {"Mon", "Tues", "Weds", "Thurs"};

        var days2 = new[] {"Thurs", "Thurs", "Fri", "Sat", "Sun"};

        var result = days1.Union(days2);

        foreach (var day in result)

        {

            Console.Write(day + " ");

        }

    }

}