#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

void solve() {
  int N;
  cin >> N;
  vector<string> s(N), t(N);
  rep(i, 0, N) { cin >> s[i]; }
  rep(i, 0, N) { cin >> t[i]; }
  rep(i, 0, N) {
    if (s[i] != t[i]) {
      cout << i + 1 << endl;
      cout << s[i] << endl;
      cout << t[i] << endl;
      return;
    }
  }
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  solve();
  getchar();
}