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


namespace ConsoleApp1
{
    class Program
    {

        public static List<string> InputChord(string chord)
        {
            // define notes
            Dictionary<string, int> rootKey = new Dictionary<string, int>
            {
                {"A", 0},
                {"A#", 1},
                {"B", 2},
                {"C", 3},
                {"C#", 4},
                {"D", 5},
                {"D#", 6},
                {"E", 7},
                {"F", 8},
                {"F#", 9},
                {"G", 10},
                {"G#", 11}
            };

            var rootKeyList = rootKey.Keys.ToList();

            // input check
            Console.WriteLine("Please put the chord notes divided with '-' : ");

            bool check = true;
            while (check)
            {
                var input = Console.ReadLine().ToUpper();
                var chordTones = input.Split('-').ToList();
                foreach (var note in chordTones)
                {
                    if (String.IsNullOrWhiteSpace(input))
                    {
                        Console.WriteLine("Please provide chord tones (at least three notes): ");
                        break;

                    }
                    else if (input.Count() < 3)
                    {
                        Console.WriteLine("Please provide at least 3 notes: ");
                        break;
                    }
                    else if (!rootKeyList.Contains(note))
                    {
                        Console.WriteLine("Incorrect {0} note, please correct: ", note);
                        break;
                    };

                }
                return chordTones;
            }

        }

        static void Main(string[] args)
        {

        }



    }




}