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

int main(){
int N;
cin >> N;
vector<string> f(N);
vector<string> l(N);
for(int i = 0; i < N; i++){
cin >> f[i];
}
for(int i = 0; i < N; i++){
cin >> l[i];
}
for(int i = 0;i < N; i++){
if(f[i]!=l[i]){
cout << i+1 << endl << f[i]<<endl << l[i] << endl;
break;
}

}
return 0;
}