#include "bits/stdc++.h"
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a) for(int i=0;i<a;i++)
#define printall(n,array) for(int i=0;i<n;i++){cout<<array[i]<<" ";}cout<<endl;
typedef long long ll;
typedef pair<int, int> PI;
typedef pair<int, PI> V;
typedef vector<int> VE;
const ll mod = 1000000007; //10^9+7

int main(){
  int n,k;
  cin>>n;
  cin>>k;
  int x[6002];
  int y[6002];
  REP(i,k)cin>>x[i]>>y[i];
  int a[102];
  rep(i,1,n+1)cin>>a[i];
  int g[102];
  rep(i,1,n+1){rep(j,1,n+1){if(a[j]==i)g[i]=j;}}
  int s[102];
  rep(i,0,n+1)s[i]=i;
  REP(i,k)swap(s[x[i]],s[y[i]]);
  //printall(n+1,s);
  vector<int> v;
  rep(i,1,n+1){
    rep(j,i+1,n+1){
      if(g[i]==s[j]){
        for(int k=j;k>1;k--){
          v.push_back(k-1);
          swap(s[k],s[k-1]);
          //printall(n+1,s);
          if(g[i]==s[i])break;
        }
      }
      if(g[i]==s[i])break;
    }
  }
  print(v.size());
  REP(i,v.size())print(v[i]<<" "<<v[i]+1);
}