School

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

public class Program
{
    public static void Main()
    {
        Dictionary<String, List<String>> school = new Dictionary<String, List<String>>();

        while (true)
        {
            String[] command = Console.ReadLine().Split(' ');
            if (command[0] == "End")
            {
                break;
            }
            else if (command[0] == "Add")
            {
                String student = command[1];
                String paralelka = command[2];
                if (school.ContainsKey(paralelka))
                {
                    school[paralelka].Add(student);
                }
                else
                {
                    /*List<String> newParalelka = new List<String>();
                    newParalelka.Add(student);
                    school[paralelka] = newParalelka;*/
                    school[paralelka] = new List<String>();
                    school[paralelka].Add(student);
                }
            }
        }

        foreach (String paralelka in school.Keys)
        {
            Console.WriteLine("Class name: " + paralelka);
            foreach (String student in school[paralelka])
            {
                Console.WriteLine("###" + student);
            }
        }
    }
}