using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Threading.Tasks;

namespace BackendYandex
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var url = "http://127.0.0.1:7777/";
            var names = new List<string>();
            var values = new List<string>() {"","","",""};
            var responses = new List<IList<string>>();

            for(int i = 0; i < 4; i++)
            {
                names.Add(Console.ReadLine());
            }

            using var client = new HttpClient();

            for(int i = 0; i < 2; i++)
            {
                var request = new HttpRequestMessage(new HttpMethod("MEW"), url);
                request.Headers.Add("X-Cat-Variable", names[i]);
                request.Headers.Add("X-Cat-Variable", names[i + 1]);
                var response = await client.SendAsync(request);
                var lst = new List<string>();
                foreach(var header in response.Headers)
                {
                    if(header.Key.ToLower() == "x-cat-value")
                    {
                        responses.Add(new List<string>(header.Value));
                    }
                }
            }
            if(responses[0][0] == responses[1][0])
            {
                values[0] = responses[0][1];
                values[1] = responses[0][0];
                values[2] = responses[1][1];
            }

            if (responses[0][0] == responses[1][1])
            {
                values[0] = responses[0][1];
                values[1] = responses[0][0];
                values[2] = responses[1][0];
            }

            if (responses[0][1] == responses[1][0])
            {
                values[0] = responses[0][0];
                values[1] = responses[0][1];
                values[2] = responses[1][1];
            }

            if (responses[0][1] == responses[1][1])
            {
                values[0] = responses[0][0];
                values[1] = responses[0][1];
                values[2] = responses[1][0];
            }

            if (responses[0][0] == responses[1][0])
            {
                values[0] = responses[0][1];
                values[1] = responses[0][0];
                values[2] = responses[1][1];
            }

            if (responses[0][0] == responses[1][1])
            {
                values[0] = responses[0][1];
                values[1] = responses[0][0];
                values[2] = responses[1][0];
            }

            if (responses[0][1] == responses[1][0])
            {
                values[0] = responses[0][0];
                values[1] = responses[0][1];
                values[2] = responses[1][1];
            }

            if (responses[0][1] == responses[1][1])
            {
                values[0] = responses[0][0];
                values[1] = responses[0][1];
                values[2] = responses[1][0];
            }
            var req = new HttpRequestMessage(new HttpMethod("MEW"), url);
            req.Headers.Add("X-Cat-Variable", names[3]);
            var res = await client.SendAsync(req);
            for(int i = 0; i < 3; i++)
            {
                Console.WriteLine(values[i]);
            }
            foreach (var header in res.Headers)
            {
                if (header.Key.ToLower() == "x-cat-value")
                {
                    bool f = false;
                    foreach (var v in header.Value)
                    {
                        Console.WriteLine(v);
                        f = true;
                        break;
                    }
                    if (f)
                        break;
                }
            }
        }
    }
}