import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;


public class Main_yukicoder326 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Printer pr = new Printer(System.out);

        int n = sc.nextInt();
        int k = sc.nextInt();
        int[] x = new int[k];
        int[] y = new int[k];
        for (int i = 0; i < k; i++) {
        	x[i] = sc.nextInt();
        	y[i] = sc.nextInt();
        }
        int[] a = new int[n];
        for (int i = 0; i < n; i++) {
        	int tmp = sc.nextInt();
        	a[tmp - 1] = i + 1;
        }

        int[] s = new int[n];
        for (int i = 0; i < n; i++) {
        	s[i] = i + 1;
        }

        for (int i = 0; i < k; i++) {
        	int tmp = s[x[i] - 1];
        	s[x[i] - 1] = s[y[i] - 1];
        	s[y[i] - 1] = tmp;
        }

        List<Integer> xx = new ArrayList<Integer>();
        List<Integer> yy = new ArrayList<Integer>();
        for (int i = 0; i < n; i++) {
        	if (s[i] != a[i]) {
        		int j;
        		for (j = i + 1; j < n; j++) {
        			if (s[j] == a[i]) {
        				break;
        			}
        		}

        		int tmpj = j;
        		while (tmpj - i >= 1) {
        			int tmp = s[tmpj];
        			s[tmpj] = s[tmpj - 1];
        			s[tmpj - 1] = tmp;

        			xx.add(tmpj);
        			yy.add(tmpj + 1);
        			tmpj--;
        		}
        	}
        }

        pr.println(xx.size());
        for (int i = 0; i < xx.size(); i++) {
        	pr.printf("%d %d\n", xx.get(i), yy.get(i));
        }

        pr.close();
        sc.close();
    }

    @SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;
		Iterator<String> it;

		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}

		String next() throws RuntimeException  {
			try {
				if (it == null || !it.hasNext()) {
					it = Arrays.asList(br.readLine().split(" ")).iterator();
				}
				return it.next();
			} catch (IOException e) {
				throw new IllegalStateException();
			}
		}

		int nextInt() throws RuntimeException {
			return Integer.parseInt(next());
		}

		long nextLong() throws RuntimeException {
			return Long.parseLong(next());
		}

		float nextFloat() throws RuntimeException {
			return Float.parseFloat(next());
		}

		double nextDouble() throws RuntimeException {
			return Double.parseDouble(next());
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new IllegalStateException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}