#include<bits/stdc++.h>
using namespace std;


int main(){
	int n;
	string s;
	vector<string> s2;
	cin >> n;
	for(int i=0;i<n;i++){
		cin >> s;
		s2.push_back(s);
	}
	for(int i=0;i<n;i++){
		cin >> s;
		if(s2[i]!=s){
			cout << i+1 << endl << s2[i] << endl << s << endl;
			return 0;
		}
	}
	
	return 0;
}