#include <iostream>
#include <string>
using namespace std;
string s[10], t[10];

int main() {
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> s[i];
  }
  for (int i = 0; i < n; i++) {
    cin >> t[i];
  }
  for (int i = 0; i < n; i++) {
    if (s[i] != t[i]) {
      cout << i + 1 << endl << s[i] << endl << t[i] << endl;
      break;
    }
  }
}