import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int k = sc.nextInt();
        int x = sc.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = i + 1;
        }
        ArrayDeque<Integer> lefts = new ArrayDeque<>();
        ArrayDeque<Integer> rights = new ArrayDeque<>();
        for (int i = 0; i < k; i++) {
            if (i == x - 1) {
                sc.next();
                sc.next();
                continue;
            }
            int a = sc.nextInt() - 1;
            int b = sc.nextInt() - 1;
            if (i < x - 1) {
                int tmp = arr[a];
                arr[a] = arr[b];
                arr[b] = tmp;
            } else {
                lefts.push(a);
                rights.push(b);
            }
        }
        int[] results = new int [n];
        for (int i = 0; i < n; i++) {
            results[i] = sc.nextInt();
        }
        while (lefts.size() > 0) {
            int a = lefts.pop();
            int b = rights.pop();
            int tmp = results[a];
            results[a] = results[b];
            results[b] = tmp;
        }
        int first = 0;
        int second = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] != results[i]) {
                if (first == 0) {
                    first = i + 1;
                } else {
                    second = i + 1;
                }
            }
        }
        System.out.println(first + " " + second);
    }
}