#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
using ll = long long;
using namespace std;
const int INF = 1e9;

int main() {
    int n;
    cin >> n;
    vector<string> a(n), b(n);
    rep(i, n) cin >> a[i];
    rep(i, n) cin >> b[i];

    rep(i, n) {
        if (a[i] != b[i]) {
            cout << i + 1 << endl
                 << a[i] << endl
                 << b[i] << endl;
            break;
        }
    }

    return 0;
}