import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
 
public class Main {
	public static void main(String[] args) throws NumberFormatException,
	IOException {Solve solve = new Solve();solve.solve();}
}
class Solve{
	void dump(int[]a){for(int i=0;i<a.length;i++)
		System.out.print(a[i]+" ");System.out.println();};
    void solve() throws NumberFormatException, IOException{
        final ContestScanner in = new ContestScanner();
        Writer out = new Writer();
        int n = in.nextInt();
        int k = in.nextInt();
        int[] a = new int[n];
        for(int i=0; i<n; i++){
        	a[i] = i;
        }
        for(int i=0; i<k; i++){
        	int x = in.nextInt()-1;
        	int y = in.nextInt()-1;
        	int tmp = a[x];
        	a[x] = a[y];
        	a[y] = tmp;
        }
        int[] map = new int[n];
        for(int i=0; i<n; i++){
        	map[a[i]] = i;
        }
        List<String> list = new ArrayList<>();
        for(int i=0; i<n; i++){
        	int b = in.nextInt()-1;
        	for(int j=map[b]; j>i; j--){
        		list.add((j)+" "+(j+1));
        		map[a[j]]--;
        		map[a[j-1]]++;
        		int tmp = a[j-1];
        		a[j-1] = a[j];
        		a[j] = tmp;
        	}
        }
        System.out.println(list.size());
        for(String s: list) System.out.println(s);
    }
}

class MultiSet<T> extends HashMap<T, Integer>{
	@Override
	public Integer get(Object key){return containsKey(key)?super.get(key):0;}
	public void add(T key,int v){put(key,get(key)+v);}
	public void add(T key){put(key,get(key)+1);}
	public void sub(T key){
		final int num = get(key);
		if(num==1) remove(key);
		else put(key, num-1);
	}
}
class Timer{
	long time;
	public void set(){time = System.currentTimeMillis();}
	public long stop(){return System.currentTimeMillis()-time;}
}
class Writer extends PrintWriter{
	public Writer(String filename) throws IOException
	{super(new BufferedWriter(new FileWriter(filename)));}
	public Writer() throws IOException{super(System.out);}
}
class ContestScanner {
	private BufferedReader reader;
	private String[] line;
	private int idx;
	public ContestScanner() throws FileNotFoundException 
	{reader = new BufferedReader(new InputStreamReader(System.in));}
	public ContestScanner(String filename) throws FileNotFoundException
	{reader = new BufferedReader(new InputStreamReader(new FileInputStream(filename)));}
	public String nextToken() throws IOException {
		if (line == null || line.length <= idx) {
			line = reader.readLine().trim().split(" ");
			idx = 0;
		}
		return line[idx++];
	}
	public String readLine() throws IOException{return reader.readLine();}
	public long nextLong() throws IOException, NumberFormatException
	{return Long.parseLong(nextToken());}
	public int nextInt() throws NumberFormatException, IOException
	{return (int) nextLong();}
	public double nextDouble() throws NumberFormatException, IOException 
	{return Double.parseDouble(nextToken());}
}