#include<bits/stdc++.h>
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

using namespace std;
typedef long long int ll;

int main(){
    int i,j,k,l;
    int m,n;
    
    cin>>n>>m;
    
    vector<int> vo(n);
    iota(vo.begin(),vo.end(),1);
    
    for (i=0;i<m;i++){
        scanf("%d%d",&k,&l);
        swap(vo[k-1],vo[l-1]);
    }
    
    vector<int> vi(n);
    for (i=0;i<n;i++){
        scanf("%d",&k);
        vi[i]=k;
    }
    vector<int> va(n);
    for (i=0;i<n;i++)
        va[vi[i]-1]=i+1;
    
    //for (int e:vo)cout<<e<<" ";cout<<endl;
    //for (int e:va)cout<<e<<" ";cout<<endl;
    
    list<int> q;
    
    for (i=0;i<(n-1);i++){
        for (j=n;i<j;j--){
            if (vo[j]==va[i]){
                swap(vo[j],vo[j-1]);
                q.push_back(j);
            }
        }
    }
    
    cout<<q.size()<<endl;
    while (!q.empty()){
        printf("%d %d\n",q.front(),q.front()+1);
        q.pop_front();
    }
    
    return 0;
}