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

namespace Yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var s = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
            int N = s[0];
            int K = s[1];
            int X = s[2];
            List<int> before = new List<int>();
            List<int> after = new List<int>();
            List<int[]> swapList = new List<int[]>();

            for (int i = 0; i < N; i++)
            {
                before.Add(i + 1);
            }

            for (int j = 0; j < K; j++)
            {
                if (j == X - 1)
                {
                    Console.ReadLine(); //X
                    int[] tmp = { 0, 0 };
                    swapList.Add(tmp);
                    continue;
                }

                var index = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
                swapList.Add(index);
            }

            after.AddRange(Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray());


            for (int i = 0; i < X - 1; i++)
            {
                Swap(swapList[i][0] - 1, swapList[i][1] - 1, before);
            }

            for (int i = K - 1; i >= X; i--)
            {
                Swap(swapList[i][0] - 1, swapList[i][1] - 1, after);
            }

            List<int> result = new List<int>();
            for (int i = 0; i < N; i++)
            {
                if (before[i] != after[i])
                {
                    result.Add(i + 1);
                }
            }
            Console.WriteLine(result[0] + " " + result[1]);
        }

        static void Swap(int a, int b, List<int> list)
        {
            int tmp;
            tmp = list[a];
            list[a] = list[b];
            list[b] = tmp;
        }
    }
}