import java.util.*;

public class No326{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int K = sc.nextInt();
		int[][] xy = new int[K][2];
		for(int i = 0; i < K; i++){
			xy[i][0] = sc.nextInt()-1;
			xy[i][1] = sc.nextInt()-1;
		}
		// int[] A = new int[N];
		// int[] A_tmp = new int[N];
		ArrayList<Integer> A = new ArrayList<Integer>();
		ArrayList<Integer> A_tmp = new ArrayList<Integer>();
		for(int i = 0; i < N; i++){
			A.add(sc.nextInt());
			A_tmp.add(i+1);
		}

		for(int i = 0; i < K; i++){
			int a_left = A_tmp.get(xy[i][0]);
			int a_right = A_tmp.get(xy[i][1]);
			A_tmp.set(xy[i][0], a_right);
			A_tmp.set(xy[i][1], a_left);
		}
		// System.out.println(A_tmp.toString());

		ArrayList<ArrayList<Integer>> ans = new ArrayList<ArrayList<Integer>>();
		for(int i = 0; i < N; i++){
			while(A_tmp.get(i) != A.get(i)){
				int idx_right = A_tmp.indexOf(A.get(i));
				int idx_left = idx_right-1;
				int a_right = A_tmp.get(idx_right);
				int a_left = A_tmp.get(idx_left);
				A_tmp.set(idx_left, a_right);
				A_tmp.set(idx_right, a_left);
				
				ArrayList<Integer> xy_new = new ArrayList<Integer>();
				xy_new.add(idx_left+1);
				xy_new.add(idx_right+1);
				ans.add(xy_new);
			}
		}
		
		System.out.println(ans.size());
		for(int i = 0; i < ans.size(); i++){
			System.out.println(ans.get(i).get(0)+" "+ans.get(i).get(1));
		}
	}
}