#include <stdio.h>

void swap(int *a, int *b) {
	int tmp = *a;
	*a = *b;
	*b = tmp;
}

int main() {
	int n, k, x;
	static int a[100000], b[100000], c[100000];
	static int cup[100000];
	int i;

	scanf("%d %d %d", &n, &k, &x);
	for (i = 0; i < n; i++) cup[i] = i + 1;

	for (i = 0; i < k; i++) {
		if (i == x - 1) {
			getchar();
			while (getchar() != '\n');
			continue;
		}
		scanf("%d %d", &a[i], &b[i]);
		if (i < x) swap(&cup[a[i] - 1], &cup[b[i] - 1]);
	}
	for (i = 0; i < n; i++) scanf("%d", &c[i]);
	for (i = k; i >= x; i--) swap(&c[a[i] - 1], &c[b[i] - 1]);

	int r1 = -1, r2;

	for (i = 0; i < n; i++) {
		if (cup[i] != c[i]) {
			if (r1 == -1) r1 = i + 1;
			else {
				r2 = i + 1;
				break;
			}
		}
	}

	printf("%d %d\n", r1, r2);
	return 0;
}