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

// https://yukicoder.me/problems/no/326
// yukicoder 326 あみだますたー
class Program
{
    static string InputPattern = "InputX";

    static IEnumerable<string> GetInputList()
    {
        string wkStr;
        while ((wkStr = Console.ReadLine()) != null) yield return wkStr;
    }

    static int[] GetSplitArr(string pStr)
    {
        return (pStr == "" ? new string[0] : pStr.Split(' ')).Select(pX => int.Parse(pX)).ToArray();
    }

    static void Main()
    {
        string[] InputList = GetInputList().ToArray();

        int[] wkArr = { };
        Action<string> SplitAct = (pStr) => wkArr = GetSplitArr(pStr);

        int Ind = 0;
        int N = 0;
        int K = 0;
        var GoalDict = new Dictionary<int, int>();
        var CurrDict = new Dictionary<int, int>();
        int[] AArr = new int[0];

        foreach (string EachStr in GetInputList()) {
            if (Ind == 0) {
                N = int.Parse(EachStr);

                for (int I = 1; I <= N; I++) {
                    CurrDict[I] = I;
                }
            }
            if (Ind == 1) {
                K = int.Parse(EachStr);
            }
            if (2 <= Ind && Ind <= K + 2) {
                SplitAct(EachStr);
                int L = wkArr[0];
                int R = wkArr[1];
                int tmp = CurrDict[L];
                CurrDict[L] = CurrDict[R];
                CurrDict[R] = tmp;
            }
            if (Ind < K + 2) {
                AArr = GetSplitArr(EachStr);
            }
            Ind++;
        }

        for (int I = 0; I <= AArr.GetUpperBound(0); I++) {
            GoalDict[AArr[I]] = I + 1;
        }

        foreach (string EachStr in InputList.Skip(2).Take((int)K)) {
            SplitAct(EachStr);
            int L = wkArr[0];
            int R = wkArr[1];
            int tmp = CurrDict[L];
            CurrDict[L] = CurrDict[R];
            CurrDict[R] = tmp;
        }

        var AnswerList = new List<int>();
        for (int I = 1; I <= N; I++) {
            int SearchVal = GoalDict[I];
            int StaInd = 0;
            for (int J = I + 1; J <= N; J++) {
                if (CurrDict[J] == SearchVal) {
                    StaInd = J;
                    break;
                }
            }
            // 既にゴールにいる場合
            if (I == StaInd) continue;

            for (int J = StaInd; I + 1 <= J; J--) {
                // 三角交換
                int tmp = CurrDict[J];
                CurrDict[J] = CurrDict[J - 1];
                CurrDict[J - 1] = tmp;

                AnswerList.Add(J - 1);
            }
        }
        Console.WriteLine(AnswerList.Count);
        foreach (int EachL in AnswerList) {
            Console.WriteLine("{0} {1}", EachL, EachL + 1);
        }
    }
}