#include<algorithm>
#include<complex>
#include<ctype.h>
#include<iomanip>
#include<iostream>
#include<fstream>
#include<map>
#include<math.h>
#include<numeric>
#include<queue>
#include<set>
#include<stack>
#include<stdio.h>
#include<string>
#include<string>
#include<vector>

using namespace std;
typedef long long ll;

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

const ll mod = 1e9 + 7;
const ll inf = 1e18;

template < typename T >
void vprint(T &V){
	for(auto v : V){
    	cout << v << " ";
	}
	cout << endl;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll N, K;
    cin >> N >> K;

    vector<ll> B(N);
    FOR(i, 0, N){
        B[i] = i;
    }

    FOR(i, 0, K){
        ll x, y;
        cin >> x >> y;
        x--; y--;
        swap(B[x], B[y]);
    }

    vector<ll> A(N);
    FOR(i, 0, N){
        cin >> A[i];
        A[i]--;
    }

    // index 逆引き
    map<ll, ll> mp;
    FOR(i, 0, N){
        mp[A[i]] = i;
    }

    vector<ll> C(N);
    FOR(i, 0, N){
        C[i] = mp[i];
    }
    map<ll, ll> mp_v_to_i;
    FOR(i, 0, N){
        mp_v_to_i[C[i]] = i;
    }
    // vprint(C);

    vector<ll> D(N);
    FOR(i, 0, N){
        ll v = B[i];
        D[i] = mp_v_to_i[v];
    }
    // vprint(D);

    vector<pair<ll, ll> > swaps;

    // Dをバブルソートする問題になった
    FOR(i, 0, N-1){
        bool swapped = false;
        for(int j=0; j<N-1-i; j++){
            if(D[j]>D[j+1]){
                swap(D[j], D[j+1]);
                swapped = true;
                swaps.push_back(make_pair(j, j+1));
            }
        }
        if(!swapped) break;
    }

    p(swaps.size());
    for(auto p : swaps){
        p2(p.first+1, p.second+1);
    }
    
    return 0;
}