#include<bits/stdc++.h>
#define REP(x,y,z) for(int x=y;x<=z;x++)
#define FORD(x,y,z) for(int x=y;x>=z;x--)
#define MSET(x,y) memset(x,y,sizeof(x))
#define FOR(x,y) for(__typeof(y.begin()) x=y.begin();x!=y.end();x++)
#define F first
#define S second
#define MP make_pair
#define PB push_back
#define SZ size()
#define M 105
void RI(){}
template<typename... T>
void RI( int& head, T&... tail ) {
    scanf("%d",&head);
    RI(tail...);
}
using namespace std;
typedef long long LL;
int n,m;
int in[M];
int cur[M];
int main()
{
	int x,y;
	while(~scanf("%d %d",&n,&m))
	{
		REP(i,1,n) cur[i]=i;
		REP(i,1,m)
		{
			RI(x,y);
			swap(cur[x], cur[y]);
		}
		REP(i,1,n) RI(in[i]);

		vector<pair<int,int>> vec;
		REP(i,1,n)
		{
			if(in[i]!=cur[i])
			{
				int pos=-1;
				REP(j,i,n) if(cur[j]==in[i])
				{
					pos = j;
					break;
				}
				
				FORD(j,pos-1,i)
				{
					vec.PB(MP(j,j+1));
					swap(cur[j], cur[j+1]);
				}
			}
		}
		printf("%d\n",vec.SZ);
		FOR(i,vec) printf("%d %d\n",i->F,i->S);

	}
	return 0;
}