#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
signed main(){
  int n,k;
  cin>>n>>k;
  vector<int> p(n);
  iota(p.begin(),p.end(),0);
  for(int i=0;i<k;i++){
    int x,y;
    cin>>x>>y;
    x--;y--;
    swap(p[x],p[y]);
  }  
  vector<int> a(n);
  for(int i=0;i<n;i++) cin>>a[i];

  vector<int> r(n);
  for(int i=0;i<n;i++) r[p[i]]=i;

  vector<int> b(n);
  for(int i=0;i<n;i++) b[i]=r[a[i]];

  vector<int> xs,ys;
  while(1){
    int flg=0;
    for(int i=0;i+1<n;i++){
      if(b[i]>b[i+1]){
        xs.emplace_back(i);
        ys.emplace_back(i+1);
        swap(b[i],b[i+1]);
        flg=1;
        break;
      }
    }
    if(flg) continue;
    break;
  }
  
  int l=xs.size();
  cout<<l<<endl;
  for(int i=0;i<l;i++) cout<<xs[i]+1<<" "<<ys[i]+1<<endl;
  return 0;
}