#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
typedef long long ll;

int main()
{

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