#include <iostream>
#include <string>
using namespace std;

const int MAX_N = 100010;

int c[MAX_N];
int r1[MAX_N], r2[MAX_N];

int main() {
    int n, k, x;
    cin >> n >> k >> x;

    for (int i = 0; i < n; i++) {
        r1[i] = i;
    }

    for (int i = 0; i < k; i++) {
        string s1, s2;
        cin >> s1 >> s2;
        if (i == x - 1) {
            for (int j = 0; j < n; j++) {
                r2[j] = r1[j];
            }
            continue;
        }
        int a = stoi(s1),
            b = stoi(s2);
        swap(r1[a - 1], r1[b - 1]);
    }

    for (int i = 0; i < n; i++) {
        cin >> c[i];
        c[i]--;
    }

    int w1, w2;
    for (int i = 0; i < n; i++) {
        if (r1[i] != c[i]) {
            w1 = r1[i];
            w2 = c[i];
        }
    }

    int ans1 = 0, ans2 = 0;
    for (int i = 0; i < n; i++) {
        if (r2[i] == w1) ans1 = i + 1;
        else if (r2[i] == w2) ans2 = i + 1;
    }
    if (ans1 > ans2) swap(ans1, ans2);
    cout << ans1 << " " << ans2 << endl;


    return 0;
}