Manipulate Array

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Problem_2.Manipulate_Array
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] arr = Console.ReadLine().Split(' ').ToArray();
            int lines = int.Parse(Console.ReadLine());


            var changeArray = arr;


            for (int i = 0; i < lines; i++)
            {
                string commands = Console.ReadLine();

                if (commands == "Distinct")
                {
                    changeArray = changeArray.Distinct().ToArray();
                }
                if (commands == "Reverse")
                {
                    Array.Reverse(changeArray);

                }
                if (commands != "Distinct" && commands != "Reverse")
                {
                    string[] replace = commands.Split(' ').ToArray();
                    changeArray[int.Parse(replace[1])] = replace[2];

                }
            }
            Console.WriteLine(string.Join(", ", changeArray));

        }
    }
}