#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<long double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-8;
const ll mod=1e9+7;
const int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

int n,k;
vi a,b,c;

int main(){
	cin>>n>>k;
	a=vi(k);
	b=vi(n);
	for(int i=0;i<k;i++){
		int u,v;
		cin>>u>>v;
		a[i]=u;
	}
	for(int i=0;i<n;i++) cin>>b[i];
	for(auto i:a) swap(b[i-1],b[i]);
	for(int i=0;i<n;i++) for(int j=0;j<n;j++) if(i+1==b[j]){
		for(int I=j;I>i;I--){
			c.push_back(I);
			swap(b[I-1],b[I]);
		}
		break;
	}
	cout<<c.size()<<endl;
	for(auto i:c) cout<<i<<' '<<i+1<<endl;
}