#include<iostream>
#include<vector>
#include<string>
using namespace std;

int main() {
    int n;
    cin >> n;
    vector<string> v1;
    vector<string> v2;
    string s;
    for(int i=0; i<n; i++) {
        cin >> s;
        v1.push_back(s);
    }
    for(int i=0; i<n; i++) {
        cin >> s;
        v2.push_back(s);
    }
    for(int i=0; i<n; i++) {
        if(v1[i] != v2[i]) {
            cout << i+1 << endl;
            cout << v1[i] << endl;
            cout << v2[i] << endl;
            break;
        }
    }


    return 0;
}