import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Set;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		
		int[] current = new int[N];
		for(int i = 0; i < N; i++){ 
			current[i] = i;
		}
		
		final int K = sc.nextInt();
		for(int i = 0; i < K; i++){
			final int X = sc.nextInt() - 1;
			final int Y = sc.nextInt() - 1;
			
			{
				final int tmp = current[X];
				current[X] = current[Y];
				current[Y] = tmp;
			}
		}
		//System.out.println(Arrays.toString(current));
		
		int[] purpose = new int[N];
		for(int i = 0; i < N; i++){
			purpose[sc.nextInt() - 1] = i;
		}
		//System.out.println(Arrays.toString(purpose));
		
		
		LinkedList<String> answers = new LinkedList<String>();	
		for(int i = 0; i < N; i++){
			if(current[i] != purpose[i]){
				
				for(int index = i + 1; index < N; index++){
					if(current[index] != purpose[i]){ continue; }
					
					{
						for(int j = index - 1; j >= i; j--){
							answers.add((j + 1) + " " + (j + 2)); 
							
							int tmp = current[j + 1];
							current[j + 1] = current[j];
							current[j] = tmp;
						}
					}
					
					//System.out.println(Arrays.toString(current));
					break;
				}
				
			}
		}
		
		System.out.println(answers.size());
		for(String str : answers){
			System.out.println(str);
		}
		//System.out.println(Arrays.toString(current));
	}

}