#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
#include <random>
#include <list>
using namespace std;
 
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<int, ll> i_ll;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };
 
#define rep(i, N) for (int i = 0; i < (int)(N); i++)
#define pb push_back
 
int INF = INT_MAX / 10;
ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

int main() {
	int N, M, j0; cin >> N >> M >> j0;
	j0--;
	vector<int> a(M), b(M);
	rep(j, M) {
		if (j == j0) {
			string s, t; cin >> s >> t;
		} else {
			cin >> a[j] >> b[j];
			a[j]--; b[j]--;
		}
	}
	vector<int> p(N);
	rep(i, N) p[i] = i + 1;
	rep(j, j0) swap(p[a[j]], p[b[j]]);
	vector<int> q(N);
	rep(i, N) cin >> q[i];
	for (int j = M - 1; j > j0; j--)
		swap(q[a[j]], q[b[j]]);
	vector<int> ans;
	rep(i, N) if (p[i] != q[i]) ans.pb(i);
	cout << ans[0] + 1 << ' ' << ans[1] + 1 << endl;
}