package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func configure(scanner *bufio.Scanner) {
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
}
func getNextString(scanner *bufio.Scanner) string {
	scanned := scanner.Scan()
	if !scanned {
		panic("scan failed")
	}
	return scanner.Text()
}
func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}
func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}
func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	configure(scanner)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	k := getNextInt(scanner)
	x := getNextInt(scanner) - 1
	ll := make([]int, n)
	cc := make([]int, n)
	aa := make([]int, k)
	bb := make([]int, k)
	for i := 0; i < k; i++ {
		if i == x {
			_, _ = getNextString(scanner), getNextString(scanner)
			continue
		}
		a := getNextInt(scanner) - 1
		b := getNextInt(scanner) - 1
		aa[i] = a
		bb[i] = b
	}
	for i := 0; i < n; i++ {
		ll[i] = i + 1
		cc[i] = getNextInt(scanner)
	}
	for i := 0; i < x; i++ {
		ll[aa[i]], ll[bb[i]] = ll[bb[i]], ll[aa[i]]
	}
	for i := k - 1; i > x; i-- {
		cc[aa[i]], cc[bb[i]] = cc[bb[i]], cc[aa[i]]
	}
	ans := make([]int, 0)
	for i := 0; i < n; i++ {
		if cc[i] == ll[i] {
			continue
		}
		ans = append(ans, i+1)
	}
	fmt.Fprintln(writer, fmt.Sprintf("%d %d", ans[0], ans[1]))
}