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

signed main(){
  int N; cin >> N;
  int K; cin >> K;
  vector< int > X( K ), Y( K );
  for( int i = 0; i < K; ++i )
    cin >> X[ i ] >> Y[ i ], --X[ i ], --Y[ i ];
  vector< int > A( N );
  for( int i = 0; i < N; ++i )
    cin >> A[ i ], --A[ i ];
  for( int i = 0; i < K; ++i )
    swap( A[ X[ i ] ], A[ Y[ i ] ] );
  vector< int > pri( N );
  for( int i = 0; i < N; ++i )
    pri[ A[ i ] ] = i;
  vector< int > cur( N );
  for( int i = 0; i < N; ++i )
    cur[ i ] = i;
  vector< int > mov;
  for( int i = 0; i < N; ++i )
    for( int j = 0; j + 1 < N - i; ++j )
      if( pri[ cur[ j ] ] > pri[ cur[ j + 1 ] ] )
        mov.push_back( j ),
        swap( cur[ j ], cur[ j + 1 ] );
  cout << mov.size() << endl;
  for( int i = mov.size() - 1; i >= 0; --i )
    cout << mov[ i ] + 1 << " " << mov[ i ] + 2 << endl;
  return 0;
}