#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

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