04. Ununion Lists

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

namespace Extended
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> prime = Console.ReadLine().Split(' ').Select(int.Parse).ToList();
            prime = prime.Distinct().ToList();
            int n = int.Parse(Console.ReadLine());
            List<int> list1 = new List<int>();
            for (int j = 0; j < n; j++)
            {
                list1 = Console.ReadLine().Split(' ').Select(int.Parse).ToList();
                list1 = list1.Distinct().ToList();
                for (int i = 0; i < list1.Count; i++)
                {

                    if (!prime.Contains(list1[i]))
                    {
                        prime.Add(list1[i]);
                    }
                    else if (prime.Contains(list1[i]))
                    {
                        prime.Remove(list1[i]);
                    }
                }
            }
            prime.Sort();
            Console.WriteLine(string.Join(" ", prime));
        }
    }
}