#include <bits/stdc++.h>
#define REP(i, a, n) for(ll i = ((ll) a); i < ((ll) n); i++)
using namespace std;
#define ll long long

int main(void) {
    int n;
    cin >> n;
    vector<string> S(n);
    vector<string> T(n);
    string ans;
    REP (i, 0, n) cin >> S[i];
    REP (i, 0, n) cin >> T[i];
    REP (i, 0, n) if (S[i] != T[i]) {
        cout << i+1 << endl << S[i] << endl << T[i] << endl;
        break;
    }
    return 0;
}