using System;
using System.Collections.Generic;
using System.Linq;

namespace No326_1{
    public class Program{
        public static void Main(string[] args){
            var n = int.Parse(Console.ReadLine());
            var k = int.Parse(Console.ReadLine());
            var seq = Enumerable.Range(1, n).ToArray();

            for(var i = 0; i < k; i++){
                var x = int.Parse(Console.ReadLine().Split(' ')[0]);

                var tmp = seq[x];
                seq[x] = seq[x - 1];
                seq[x - 1] = tmp;
            }

            var goal = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            var resultList = new List<int>();
            for(var i = 1; i < n; i++){
                for(var j = 1; j < n - i + 1; j++){
                    if(Array.IndexOf(goal, seq[j]) < Array.IndexOf(goal, seq[j - 1])){
                        var tmp = seq[j];
                        seq[j] = seq[j - 1];
                        seq[j - 1] = tmp;
                        resultList.Add(j);
                    }
                }
            }

            Console.WriteLine(resultList.Count);
            resultList.ForEach(i => Console.WriteLine($"{i} {i + 1}"));
        }
    }
}