#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main() {
  int n;
  cin >> n;
  vector<string> v1(n);
  vector<string> v2(n);

  for (int i=0; i<n; i++) {
    cin >> v1[i];
  }

  for (int i=0; i<n; i++) {
    cin >> v2[i];
  }

  for (int i=0; i<n; i++) {
    if (v1[i]!=v2[i]) {
      cout << i+1 << endl;
      cout << v1[i] << endl;
      cout << v2[i] << endl;
      return 0;
    }
  }
}