#include <bits/stdc++.h>
using namespace std;

long long gcd(long long x, long long y)
{
    if (y == 0)
        return x;
    return gcd(y, x % y);
}

long long lcm(long long x, long long y)
{
    if (x == 0 || y == 0)
        return 0;
    return x / gcd(x, y) * y;
}

int main()
{
    int N;
    cin >> N;
    vector<string> S(N), T(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;
            cout << S[i] << endl;
            cout << T[i] << endl;
            break;
        }
    }
}