import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int k = sc.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = i;
        }
        for (int i = 0; i < k; i++) {
            int idx = sc.nextInt();
            sc.nextInt();
            int tmp = arr[idx];
            arr[idx] = arr[idx - 1];
            arr[idx - 1] = tmp;
        }
        int[] next = new int[n];
        for (int i = 0; i < n; i++) {
            next[i] = sc.nextInt() - 1;
        }
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = 0; i < n; i++) {
            int idx = 0;
            for (int j = i; j < n; j++) {
                if (arr[j] == next[i]) {
                    idx = j;
                    break;
                }
            }
            for (int j = idx; j > i; j--) {
                int tmp = arr[j];
                arr[j] = arr[j - 1];
                arr[j - 1] = tmp;
                list.add(j);
            }
        }
        StringBuilder sb = new StringBuilder();
        sb.append(list.size()).append("\n");
        for (int x : list) {
            sb.append(x).append(" ").append(x + 1).append("\n");
        }
        System.out.print(sb);
    }
}