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

int main()
{
	int n {};
	cin >> n;
	vector< string > s( n ), f( n );
	
	for_each( begin( s ), end( s ), [&]( auto&& t ) { cin >> t; } );
	for_each( begin( f ), end( f ), [&]( auto&& t ) { cin >> t; } );
	
	for( int i=0 ; i<n ; ++i ) {
		if( s[i] != f[i] ) {
			cout << i + 1 << "\n" << s[i] << "\n" << f[i] << endl;
			break;
		}
	}
}