#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

typedef vector<int> vi;
typedef pair<int, int> pii;

int main()
{
	int N, K; cin >> N >> K;

	vi B(N);
	rep(i, 0, N) B[i] = i;

	while (0 < K--)
	{
		int x, y; cin >> x >> y;
		x--; y--;
		swap(B[x], B[y]);
	}

	vi A(N);
	rep(i, 0, N) cin >> A[i];
	rep(i, 0, N) A[i]--;

	vector<pii> ans;
	rep(i, 0, N)
	{
		int index = 0;
		rep(j, i, N) if (A[i] == B[j]) index = j;
		rrep(j, index, i + 1)
		{
			ans.push_back(pii(j-1, j));
			swap(B[j-1], B[j]);
		}
	}

	cout << ans.size() << endl;
	for (pii p : ans) cout << p.first << " " << p.second << endl;
}