import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int [] Cupf = new int [N];
        for(int i=0; i<N; i++){
            Cupf[i]=i+1;
        }
        int K = sc.nextInt();
        int [] A = new int [K];
        int [] B = new int [K];
        int X = sc.nextInt();
        for(int i=0; i<K; i++){
            if(i!=X-1){
                A[i]=sc.nextInt();
                B[i]=sc.nextInt();
            }
        }
        
        for(int i=0; i<X-1; i++){
            int t = Cupf[ A[i]-1 ];
            Cupf[ A[i]-1 ] = Cupf[ B[i]-1 ];
            Cupf[ B[i]-1 ] = t;
        }
        

        int [] Cupt = new int [N];
        for(int i=0; i<N; i++){
            Cupt[i]=sc.nextInt();
        }
        for(int i=K-1; i>X-1; i--){
            int t = Cupt[ A[i]-1 ];
            Cupt[ A[i]-1 ] = Cupt[ B[i]-1 ];
            Cupt[ B[i]-1 ] = t;
        }
        int [] r = new int [2];
        int z =0;
        for(int i=0; i<N; i++){
            if(Cupf[i]!=Cupt[i]){
                r[z]=i+1;
                z++;
            }
        }
        System.out.println(r[0]+" "+r[1]);
    }
}