#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
using namespace std;
typedef pair<int,int> Paint;
int main(){
    int n,k,x;cin>>n>>k>>x;
    vector<Paint> z;
    for(int i = 0; k > i; i++){
        if(i+1==x){
          char a,b;cin>>a>>b;
          z.push_back({0,0});
          continue;
        }
        int a,b;cin>>a>>b;
        z.push_back({a,b});
    }
    vector<int> mae;
    for(int i = 0; n > i; i++){
        mae.push_back(i+1);
    }
    vector<int> usi(n);
    for(int i = 0; n > i; i++){
        cin>>usi[i];
    }
    for(int i = 0; k > i; i++){
        if(!z[i].first)break;
        swap(mae[z[i].first-1],mae[z[i].second-1]);
    }
    for(int i = k-1; 0 <= i; i--){
        if(!z[i].first)break;
        swap(usi[z[i].first-1],usi[z[i].second-1]);
    }
    vector<int> ans;
    for(int i = 0; n > i; i++){
        if(mae[i]!=usi[i]){
            ans.push_back(i+1);
        }
    }
    cout << ans[0] << " " << ans[1] << endl;
}