#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
#include <iomanip>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 
#define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) 

int main()
{

  CIN( ll , N );
  string S[10];
  string T[10];

  for( ll i = 0 ; i < N ; i++ ){

    cin >> S[i];

  }

  for( ll i = 0 ; i < N ; i++ ){

    cin >> T[i];

  }

  for( ll i = 0 ; i < N ; i++ ){

    if( S[i] != T[i] ){

      cout << i+1 << endl;
      cout << S[i] << endl;
      cout << T[i] << endl;
      return 0;
  
    }

  }

  return 0;

}