#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>
#include <ctype.h>
#include <set>
#include <sstream>

using namespace std;


int main() {
	int i, j, k;
	int n;
	vector<string>s, t;

	cin >> n;

	for (i = 0; i < n; i++) {
		string st;
		cin >> st;
		s.push_back(st);
	}
	
	for (i = 0; i < n; i++) {
		string st;
		cin >> st;
		t.push_back(st);
	}

	for (i = 0; i < n; i++) {
		if (s[i] != t[i]) {
			cout << i+1 << endl;

			cout << s[i] << endl;
			cout << t[i] << endl;

			break;

			/*
			for (j = 0; j < s[i].length(); j++) {
				if (j >= t[i].length()) {
					cout << s[i][j];
				}
				else if (s[i][j] != t[i][j]) {
					cout << s[i][j];
				}
			}
			cout << endl;

			for (j = 0; j < t[i].length(); j++) {
				if (j >= s[i].length()) {
					cout << t[i][j];
				}
				else if (t[i][j] != s[i][j]) {
					cout << t[i][j];
				}
			}
			cout << endl;
			break;
			*/
		}

	}

	


	getchar();
	getchar();
	return 0;
}