String Manipulator

using System;
using System.Linq;

namespace _01G2August
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();



            while (true)
            {
                string commands = Console.ReadLine();
                string[] cmd = commands.Split(" ");
                string cmdType = cmd[0];
                if(cmdType == "Done")
                {
                    break;
                }
                if(cmdType == "Change")
                {
                    string ch = cmd[1];
                    string replacement = cmd[2];

                    input = input.Replace(ch,replacement);
                    Console.WriteLine(input);
                }
                if(cmdType == "Includes")
                {
                    bool valid = input.Contains(cmd[1]);
                    Console.WriteLine(valid);
                }
                if(cmdType == "End")
                {
                    bool end = input.EndsWith(cmd[1]);
                    Console.WriteLine(end);
                }
                if(cmdType == "Uppercase")
                {
                    input = input.ToUpper();
                    Console.WriteLine(input);
                }
                if(cmdType == "FindIndex")
                {
                    int indexOf = input.IndexOf(cmd[1]);
                    Console.WriteLine(indexOf);
                }
                if(cmdType == "Cut")
                {
                    int startIndex = int.Parse(cmd[1]);
                    int count = int.Parse(cmd[2]);
                    string removedString = input.Substring(startIndex,count);
                    Console.WriteLine(removedString);
                }
            }
        }
    }
}