#include<bits/stdc++.h>
using namespace std;

#define int long long
typedef vector<int>vint;
typedef pair<int,int>pint;
typedef vector<pint>vpint;
#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,f,n) for(int i=(f);i<(n);i++)
#define all(v) (v).begin(),(v).end()
#define each(it,v) for(__typeof((v).begin()) it=(v).begin();it!=(v).end();it++)
#define pb push_back
#define fi first
#define se second
template<typename A,typename B>inline void chmin(A &a,B b){if(a>b)a=b;}
template<typename A,typename B>inline void chmax(A &a,B b){if(a<b)a=b;}

signed main(){
    int N,K,X;
    cin>>N>>K>>X;X--;

    vint A(K),B(K),C(N);
    rep(i,K){
        if(i==X){
            char c,d;
            cin>>c>>d;
        }
        else{
            cin>>A[i]>>B[i];
            A[i]--;B[i]--;
        }
    }
    rep(i,N)cin>>C[i];
    vint D(N);rep(i,N)D[i]=i+1;
    rep(i,X){
        swap(D[A[i]],D[B[i]]);
    }
    for(int i=K-1;i>X;i--){
        swap(C[A[i]],C[B[i]]);
    }


    vint ans;
    rep(i,N){
        if(C[i]!=D[i])ans.pb(i+1);
    }
    cout<<ans[0]<<" "<<ans[1]<<endl;
    return 0;
}