#include <iostream>
#include <vector>
#include <string>

#define REP(i, a, b) for (int i = int(a); i < int(b); i++)
#define dump(s) cerr << __LINE__ << "\t:" << #s << " = " << (s) << endl
    
using namespace std;

int main () {
    int N;
    cin >> N;
    vector<string> S(N), T(N);
    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;
	    cout << S[i] << endl;
	    cout << T[i] << endl;
	}
    }
    return 0; 
}