#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <algorithm>
//---------------------------
using namespace std;
//---------------------------
#define REP(i,n) for(int i = 0; i < (n); i++)
#define P(x) cout << (x) << "\n"
//---------------------------


int main(){
  std::ios::sync_with_stdio(false);
  std::cin.tie(0);


  int n;cin>>n;
  vector<string> a(n),b(n);
  REP(i,n){cin >>a[i];}
  REP(i,n){cin >>b[i];}
  REP(i,n){
    if (a[i] != b[i]) {
      cout << i+1 << "\n" << a[i] << "\n" << b[i] <<"\n";
      break;
    }
  }

  return 0;
}