#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n, k, x;
  cin >> n >> k >> x;
  vector<int> a(n), b(n);
  iota(a.begin(), a.end(), 1);
  vector<pair<string, string>> v(k);
  rep(i, k) cin >> v[i].first >> v[i].second;
  rep(i, n) cin >> b[i];
  for (int j = 0; j < x - 1; ++j) {
    auto [s, t] = v[j];
    int u = stoi(s), v = stoi(t);
    swap(a[u - 1], a[v - 1]);
  }
  for (int j = k - 1; j >= x; --j) {
    auto [s, t] = v[j];
    int u = stoi(s), v = stoi(t);
    swap(b[u - 1], b[v - 1]);
  }
  vector<int> ans;
  rep(i, n) {
    if (a[i] != b[i]) {
      ans.push_back(i + 1);
    }
  }
  assert(ans.size() == 2);
  cout << ans[0] << ' ' << ans[1] << '\n';
  return 0;
}