Password Reset

using System;
using System.Linq;
using System.Text;

namespace Problem_1._Password_Reset
{
    class Program
    {
        static void Main(string[] args)
        {
            string password = Console.ReadLine();
            string input;
            string oddText = string.Empty;
            while ((input = Console.ReadLine()) != "Done")
            {
                string[] split = input.Split();

                string command = split[0];
                if (command == "TakeOdd")
                {
                    for (int i = 1; i < password.Length; i += 2)
                    {
                        oddText += password[i];
                    }
                    password = oddText;
                    Console.WriteLine(password);
                    //result = string.Concat(password.Where((c, i) => i % 2 != 0));
                    //Console.WriteLine(result);
                }
                //Cut 15 3
                if (command == "Cut")
                {
                    int index = int.Parse(split[1]);
                    int lenght = int.Parse(split[2]);
                    if (!(index >= password.Length || lenght > password.Length))
                    {
                        password = password.Remove(index, lenght);
                        //result = result.Substring(0, index) + result.Substring(lenght + 1);
                        Console.WriteLine(password);

                    }
                    else
                    {
                        break;
                    }
                }
                //Substitute :: -
                if (command == "Substitute")
                {
                    string substring = split[1];
                    string substitute = split[2];

                    if (password.Contains(substring))
                    {

                        password = password.Replace(substring, substitute);
                        Console.WriteLine(password);
                    }
                    else
                    {
                        Console.WriteLine("Nothing to replace!");
                    }
                }
            }
            Console.WriteLine($"Your password is: {password}");
        }
    }
}