#include <bits/stdc++.h>
using namespace std;

#define int long long

#define rep(i,s,n) for(int i = s;i<n;i++)
#define repe(i,s,n) for(int i = s;i<=n;i++)
#define rrep(i,s,n) for(int i = (n)-1;i>=(s);i--)
#define all(v) (v).begin(),(v).end()
#define pb push_back
#define fi first
#define se second
#define chmin(a,b) a=b
#define chmax(a,b) a=b
typedef long long ll;
typedef pair<int,int>pint;
typedef vector<int>vint;
typedef vector<pint>vpint;
typedef pair<pint,int> P1;
typedef pair<int,pint> P2;
typedef pair<pint,pint>PP;
static const ll maxLL = (ll)1 << 62;
const ll MOD=1000000007;
const ll INF=1e18;
int dx[]={0,0,1,-1};
int dy[]={-1,1,0,0};

int N,K;
int x[101],y[101];
int a[101];
int b[101];

signed main(){
    cin.tie(0);
	ios::sync_with_stdio(false);
    cin>>N>>K;
    rep(i,0,K){
        cin>>x[i]>>y[i];
    }
    rep(i,1,N+1)cin>>a[i];
    rep(i,0,K){
        swap(a[x[i]],a[y[i]]);
    }
    vpint ans;
    rep(i,1,N+1)b[i]=i;
    rep(i,1,N+1){
        rep(j,1,N+1){
            if(a[i]==b[j]){
                rrep(k,i+1,j+1){
                    ans.pb(pint(k-1,k));
                    swap(a[k-1],a[k]);
                }
            }
        }
        /*rep(i,1,N+1)cout<<a[i]<<" ";
        cout<<endl;*/
    }
    reverse(all(ans));
    cout<<ans.size()<<"\n";
    for(auto e:ans){
        cout<<e.fi<<" "<<e.se<<"\n";
    }
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    return 0;
}