#include <bits/stdc++.h>

using namespace std;

string A[100005];
string B[100005];
int N,K,X;
int C[100005];
int D[100005];
int main(void)
{
	cin.tie(0);
	ios::sync_with_stdio(false);

  cin >> N >> K >> X;

  for(int i=1;i<=K;i++)
  {
    cin >> A[i] >> B[i];
  }

  for(int i=1;i<=N;i++)
  {
    cin >> D[i];
  }

  for(int i=1;i<=N;i++)
  {
    C[i] = i;
  }

  for(int i=1;i<X;i++)
  {
    int idx1 = stoi(A[i]);
    int idx2 = stoi(B[i]);
    int temp1 = C[idx1];
    int temp2 = C[idx2];
    C[idx2] = temp1;
    C[idx1] = temp2;
  }
  for(int i=K;i>X;i--)
  {
    int idx1 = stoi(A[i]);
    int idx2 = stoi(B[i]);    
    int temp1 = D[idx1];
    int temp2 = D[idx2];
    D[idx2] = temp1;
    D[idx1] = temp2;
  }

  vector <int> res;

  for(int i=1;i<=N;i++)
  {
    //cout << C[i] << ' ' << D[i] << '\n';
    if(C[i]!=D[i])
    {
      res.push_back(i);
    }
  }

  cout << res[0] << ' ' << res[1] << '\n';

	return 0;
}