#include <bits/stdc++.h>

using namespace std;

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 << s[i] << endl << t[i] << endl;
            return 0;
        }
    }
}