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

int main() {
    int n, k;
    cin >> n >> k;
    int nums[n+1];
    for (int i = 1; i <= n; i++)
        nums[i] = i;
    for (int i = 0; i < k; i++) {
        int x, y;
        cin >> x >> y;
        swap(nums[x],nums[y]);
    }
    vector<pair<int,int>> bars;
    for (int i = 1; i <= n; i++) {
        int a;
        cin >> a;
        for (int j = i+1; j <= n; j++) {
            if (nums[j] == a) {
                for (int l = j; l > i; l--) {
                    bars.push_back(make_pair(l-1,l));
                    swap(nums[l-1],nums[l]);
                }
            }
        }
    }
    cout << bars.size() << endl;
    for (auto p : bars)
        cout << p.first << " " << p.second << endl;
    return 0;
}