#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    int n, m;
    cin >> n >> m;
    int a[n] = {};
    rep(i,n) a[i] = i;
    rep(i,m){
        int x, y;
        cin >> x >> y;
        x--; y--;
        swap(a[x], a[y]);
    }
    int b[n] = {};
    rep(i,n){
        cin >> b[i];
        b[i]--;
    }
    int c[n] = {};
    rep(i,n){
        c[i] = b[i];
    }
    rep(i,n){
        a[i] = c[a[i]];
    }
    vector<P> ans;
    int cnt = 0;
    rep(_,200){
        rep(i,n-1){
            if(a[i] > a[i+1]){
                ans.push_back(P(i+1,i+2));
                cnt++;
                swap(a[i],a[i+1]);
            }
        }
    }
    cout << cnt << endl;
    rep(i,cnt){
        cout << ans[i].first << ' ' << ans[i].second << endl;
    }
    return 0;
}