#include <bits/stdc++.h>

using namespace std;

namespace {

    typedef double real;
    typedef long long ll;

    template<class T> ostream& operator<<(ostream& os, const vector<T>& vs) {
        if (vs.empty()) return os << "[]";
        os << "[" << vs[0];
        for (int i = 1; i < vs.size(); i++) os << " " << vs[i];
        return os << "]";
    }
    template<class T> istream& operator>>(istream& is, vector<T>& vs) {
        for (auto it = vs.begin(); it != vs.end(); it++) is >> *it;
        return is;
    }

    int N, K;
    vector<int> A, B;
    void input() {
        cin >> N >> K;
        A.clear(); A.resize(N);
        for (int i = 0; i < N; i++) A[i] = i;
        for (int i = 0; i < K; i++) {
            int x, y; cin >> x >> y; x--; y--;
            swap(A[x], A[y]);
        }
        B.clear(); B.resize(N);
        for (int i = 0; i < N; i++) {
            cin >> B[i]; B[i]--;
        }
    }

    void solve() {
        vector<pair<int,int>> ans;
        for (int i = 0; i < N; i++) {
            int src = i;
            int dst = -1;
            for (int j = 0; j < N; j++) {
                if (A[j] == B[i]) {
                    dst = j;
                    break;
                }
            }
            assert(dst >= 0);
            if (dst == src) continue;
            int dir = (dst - src) / abs(dst - src);
            for (int j = src; j != dst; j += dir) {
                ans.emplace_back(j, j + dir);
            }
        }
        cout << ans.size() << endl;
        for (int i = 0; i < ans.size(); i++) {
            cout << ans[i].first << " " << ans[i].second << endl;
        }
    }
}

int main() {
    input(); solve();
    return 0;
}