Hogwarts

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

namespace _05.Task5
{
    class Program
    {
        static void Main(string[] args)
        {
            long n = long.Parse(Console.ReadLine());
            string sum = string.Empty;
            List<string> names = new List<string>();
            string housesGR = "Gryffindor";
            string housesSl = "Slytherin ";
            string housesRaven = "Ravenclaw ";
            string housesHuff = "Hufflepuff ";
            string sum1 = string.Empty;
            int Gryffindor = 0;
            int Slytherin = 0;
            int Ravenclaw = 0;
            int Hufflepuff = 0;

            for (int i = 0; i < n; i++)
            {
                string[] input = Console.ReadLine().Split(' ').ToArray();
                string initi = "" + input[0][0] + input[1][0];
                sum = SumStudentsName(sum, input);
                sum1 = sum;
                //sum = sum.Substring(0, sum.Length - 2);
                if (long.Parse(sum) % 4 == 0)
                {
                    names.Add(housesGR.ToString() + " ");
                    names.Add(sum1.ToString()+initi + "\n");
                    sum = string.Empty;
                    Gryffindor++;
                }
                else if (int.Parse(sum) % 4 == 1)
                {
                    names.Add(housesSl);
                    names.Add(sum1.ToString() + initi + "\n");
                    sum = string.Empty;
                    Slytherin++;
                }
                else if (long.Parse(sum) % 4 == 2)
                {
                    names.Add(housesRaven);
                    names.Add(sum1.ToString() + initi + "\n");
                    sum = string.Empty;
                    Ravenclaw++;
                }
                else if (long.Parse(sum) % 4 == 3)
                {
                    names.Add(housesHuff);
                    names.Add(sum1.ToString() + initi + "\n");
                    sum = string.Empty;
                    Hufflepuff++;
                }
            }
            Console.WriteLine(string.Join("", names));
            Console.WriteLine("Gryffindor: {0}", Gryffindor);
            Console.WriteLine("Slytherin: {0}", Slytherin);
            Console.WriteLine("Ravenclaw: {0}", Ravenclaw);
            Console.WriteLine("Hufflepuff: {0}", Hufflepuff);

        }
        private static string SumStudentsName(string sum, string[] input)
        {
            long sum1 = 0;
            long sum2 = 0;
            string capitalLetter = string.Empty;
            foreach (var item in input[0])
            {
                sum1 += item;
                //if (char.IsUpper(item))
                //{
                //    capitalLetter += item;
                //}
            }
            foreach (var item in input[1])
            {
                sum2 += item;
                //if (char.IsUpper(item))
                //{
                //    capitalLetter += item;
                //}
            }

            sum = ((sum1 + sum2).ToString());
            return sum.ToString();
        }
    }
}