PasswordReset_ExamApril2020_V2

using System;
using System.Text;
using System.Text.RegularExpressions;

namespace PasswordReset_ExamApril2020
{
    class Program
    {
        static void Main(string[] args)
        {
            string password = Console.ReadLine();
            StringBuilder newRawPassword = new StringBuilder();
            while (true)
            {
                string[] command = Console.ReadLine().Split();

                if (command[0] == "Done")
                {
                    break;
                }

                if (command[0] == "TakeOdd")
                {

                    for (int i = 1; i < password.Length; i +=2)
                    {
                        newRawPassword.Append(password[i]);
                    }

                    Console.WriteLine(newRawPassword);
                }
                else if (command[0] == "Cut")
                {
                    string cut = newRawPassword.ToString().Substring(int.Parse(command[1]), int.Parse(command[2]));
                    int index = newRawPassword.ToString().IndexOf(cut);
                    newRawPassword = newRawPassword.Remove(index, cut.Length);
                    Console.WriteLine(newRawPassword);
                }
                else if (command[0] == "Substitute")
                {
                    if (newRawPassword.ToString().Contains(command[1]))
                    {
                        newRawPassword = newRawPassword.Replace(command[1], command[2]);
                        Console.WriteLine(newRawPassword);
                    }
                    else
                    {
                        Console.WriteLine("Nothing to replace!");
                    }
                }

            }

            Console.WriteLine($"Your password is: {newRawPassword}");
        }
    }
}