#include <vector>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <algorithm>
#include <utility>
#include <functional>
#include <sstream>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <climits>
#include <fstream>
using namespace std;
inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; }
template<class T> inline string toStr(T x) { ostringstream sout; sout << x; return sout.str(); }
typedef vector<int> vi;
typedef vector<vi>  vvi;
typedef vector<string> vs;
typedef pair<int, int> pii;
typedef long long ll;
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define REP(i,n) FOR(i,0,(n)-1)
const double EPS = 1e-10;
const double PI = acos(-1.0);
const int INF = INT_MAX / 2;

int main() {
	int N, K, X;
	cin >> N >> K >> X;
	
	vi A(K+1), B(K+1);
	FOR(i, 1, K) {
		if (i != X) {
			cin >> A[i] >> B[i];
		}
		else {
			char c;
			cin >> c >> c;
		}
	}
	vi C(N+1);
	FOR(i, 1, N) {
		cin >> C[i];
	}

	vi s(N+1);
	FOR(i, 1, N) {
		s[i] = i;
	}

	FOR(i, 1, X-1) {
		swap(s[A[i]], s[B[i]]);
	}

	for (int i = K; i > X; i--) {
		swap(C[A[i]], C[B[i]]);
	}

	vi ans(1, 0);
	FOR(i, 1, N) {
		if (s[i] != C[i]) {
			ans.push_back(i);
		}
	}
	
	cout << ans[1] << " " << ans[2] << endl;
	return 0;
}