import java.io.*;
import java.math.BigDecimal;
import java.util.*;
public class Main {
	static long MOD = 2 << 29;
	public static void main(String[] args) {
		FastScanner sc = new FastScanner();
		int N = sc.nextInt();
		int K = sc.nextInt();
		int X = sc.nextInt();
		int[] A = new int[K];
		int[] B = new int[K];
		for(int i = 0; i < K; i++) {
			if(i + 1 == X) {
				sc.next();
				sc.next();
				continue;
			}
			A[i] = sc.nextInt()-1;
			B[i] = sc.nextInt()-1;
		}
		int[] C = new int[N];
		for(int i = 0; i < N; i++) {
			C[i] = sc.nextInt();
		}
		int[] F = new int[N];
		for(int k = 0; k < N; k++) {
			F[k] = k + 1;
		}
		for(int k = 0; k < K; k++) {
			if(k + 1 == X) {
				continue;
			}
			else {					
				swap(F,A[k],B[k]);
			}
		}
		int IDA = -1;
		int IDB = -1;
		for(int k = 0; k < N; k++) {
			if(C[k] != F[k]) {
				if(IDA != -1) {
					IDB = k+1;
				}
				else {
					IDA  = k+1;
				}		
			}
			
		}
		System.out.println(IDA + " " + IDB);
		
	}
	static void swap(int[] A, int b, int c) {
		int tmp = A[b];
		A[b] = A[c];
		A[c] = tmp;
	}
	
	
}

class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}
    public boolean hasNext() { skipUnprintable(); return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        if (!hasNext()) throw new NoSuchElementException();
        int n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
}