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

int main(){
  int n;
  cin >> n;
  string a[n];
  string b[n];
  for(int i=0;i<n;i++)cin >> a[i];
  for(int i=0;i<n;i++)cin >> b[i];
  for(int i=0;i<n;i++){
    if(a[i]!=b[i]){
      cout << i+1 << endl;
      cout << a[i] << endl;
      cout << b[i] << endl;
      return 0;
    }
  }
}