#include<iostream>
#include<vector>
using namespace std;

int main(){
    int n, k;
    cin >> n >> k;

    int v[n];
    for(int i = 0; i < n; i++)  v[i] = i+1;

    int x, y;
    for(int i = 0; i < k; i++){
        cin >> x >> y;
        swap(v[--x], v[--y]);
    }

    int a[n];
    for(int i = 0; i < n; i++)  cin >> a[i];

    vector<pair<int,int>> ans;
    for(int i = 0; i < n; i++){
        if(v[i] == a[i])    continue;
        int j;
        for(j = i+1; j < n; j++)    if(a[i] == v[j])    break;
        while(v[i] != a[i]){
            ans.push_back({j, j+1});
            swap(v[j-1], v[j]);
            j--;
        }
    }

    cout << ans.size() << endl;

    for(pair<int,int> p : ans)  cout << p.first << " " << p.second << endl;

    return 0;
}