The pianist

using System;
using System.Collections.Generic;
using System.Linq;

namespace thePianist
{
    class thePianist
    {
        static void Main(string[] args)
        {
            Dictionary<string, Dictionary<string, string>> pianist = new Dictionary<string, Dictionary<string, string>>();

            int n = int.Parse(Console.ReadLine());

            for (int i = 0; i < n; i++)
            {
                string[] arguments = Console.ReadLine().Split("|", StringSplitOptions.RemoveEmptyEntries);
                string piece = arguments[0];
                string composer = arguments[1];
                string key = arguments[2];

                    if (!pianist.ContainsKey(piece))
                    {
                    pianist[piece] = new Dictionary<string, string>();
                    pianist[piece].Add(composer, key);

                    }
                else if (!pianist.ContainsKey(composer))
                {
                    pianist[piece].Add(composer, key);
                }


            }


            string command = string.Empty;
            string composer2 = string.Empty;
            while ((command = Console.ReadLine()) != "Stop")
            {
                string[] arguments = command.Split("|", StringSplitOptions.RemoveEmptyEntries);
                string comandy = arguments[0];
                if (comandy == "Add")
                {
                    string piece = arguments[1];
                   composer2 = arguments[2];
                    string key = arguments[3];

                    if (!pianist.ContainsKey(piece))
                    {
                        pianist[piece] = new Dictionary<string, string>();
                        pianist[piece].Add(composer2, key);
                        Console.WriteLine($"{piece} by {composer2} in {key} added to the collection!");
                    }
                    else
                    {
                        Console.WriteLine($"{piece} is already in the collection!");
                    }




                }
                else if (comandy == "Remove")
                {
                    string piece = arguments[1];

                    if (pianist.ContainsKey(piece))
                    {
                        pianist.Remove(piece);
                        Console.WriteLine($"Successfully removed {piece}!");
                    }
                    else
                    {
                        Console.WriteLine($"Invalid operation! {piece} does not exist in the collection.");
                    }
                }
                else if (comandy == "ChangeKey")
                {
                    string piece = arguments[1];
                    string newKey = arguments[2];

                    if (pianist.ContainsKey(piece))
                    {

                        pianist[newKey] = pianist[piece];
                    }
                    else
                    {
                        Console.WriteLine($"Invalid operation! {piece} does not exist in the collection.");
                    }
                }
            }

            foreach (var item in pianist.OrderBy(x=>x.Key))
            {
                foreach (var kvp in item.Value.OrderBy(x=>x.Key))
                {
                    Console.WriteLine($"{item.Key} -> Composer: {kvp.Key}, Key: {kvp.Value}");
                }

            }
        }
    }
}