#include <cstdio>
#include <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <bitset>
#include <iomanip>
#include <limits>
#include <chrono>
#include <random>
#include <array>
#include <unordered_map>
#include <functional>
#include <complex>

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

const long long MAX = 5100000;
const long long INF = 1LL << 60;
const long long mod = 1000000007LL;
//const long long mod = 998244353LL;

using namespace std;
typedef unsigned long long ull;
typedef long long ll;



int main()
{
	/*
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	*/

	ll N, K; scanf("%lld %lld", &N, &K);
	vector<ll> t(N); for (ll i = 0; i < N; i++) t[i] = i;
	for (ll i = 0; i < K; i++) {
		ll x, y;
		scanf("%lld %lld", &x, &y);
		x--; y--;
		swap(t[x], t[y]);
	}
	vector<ll> a(N); for (ll i = 0; i < N; i++) {
		ll x;
		scanf("%lld", &x);
		a[x - 1] = i + 1;
	}
	map<ll, ll> mp;
	for (ll i = 0; i < N; i++) {
		mp[a[i] - 1] = i;
	}
	
	for (ll i = 0; i < N; i++) {
		t[i] = mp[t[i]];
	}
	vector<pair<ll, ll>> res;
	for (ll i = N - 1; i >= 0; i--) {
		for (ll j = N - 1; j > 0; j--) {
			if (t[j - 1] > t[j]) {
				res.emplace_back(j - 1, j);
				swap(t[j - 1], t[j]);
			}
		}
	}
	cout << res.size() << "\n";
	for (ll i = 0; i < res.size(); i++) {
		printf("%lld %lld\n", res[i].first + 1, res[i].second + 1);
	}
	return 0;
}