import java.util.Scanner;

public class Test {
	public static Scanner sc = new Scanner(System.in);

	public static void main(String[] args) {
		int n = sc.nextInt(), k = sc.nextInt(), a, b, tmp, cnt = 0;
		String[] s = new String[n * (n - 1) / 2];
		int[] t = new int[n + 1], m = new int[n + 1];
		for (int i = 1; i <= n; i++) {
			t[i] = i;
		}
		for (int i = 0; i < k; i++) {
			a = sc.nextInt();
			b = sc.nextInt();
			tmp = t[a];
			t[a] = t[b];
			t[b] = tmp;
		}
		for (int i = 1; i <= n; i++) {
			tmp = sc.nextInt();
			m[tmp] = i;
		}
		for (int i = 1; i < n; i++) {
			if (t[i] == m[i]) {
				continue;
			}
			for (int j = i + 1; j <= n; j++) {
				if (t[j] == m[i]) {
					for (int l = j; l > i; l--) {
						tmp = t[l - 1];
						t[l - 1] = t[l];
						t[l] = tmp;
						s[cnt] = (l - 1) + " " + l;
						cnt++;
					}
					break;
				}
			}
		}
		System.out.println(cnt);
		for (int i = 0; i < cnt; i++) {
			System.out.println(s[i]);
		}
	}
}