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

int main() {
	int n;
	cin >> n;
	vector<string> s(n), t(n);
	for (auto &x : s) cin >> x;
	for (auto &x : t) cin >> x;
	for (int i = 0; i < n; ++i)
		if (s[i] != t[i])
			cout << i + 1 << endl << s[i] << endl << t[i] << endl;
}