#include <iostream>
using namespace std;
int main(){
    int n;cin>>n;
    string a[n],b[n];
    for(int i = 0; n > i; i++)cin>>a[i];
    for(int i = 0; n > i; i++)cin>>b[i];
    for(int i = 0; n > i; i++){
        if(a[i] != b[i]){
            cout << i+1 << endl;
            cout << a[i] << endl;
            cout << b[i] << endl;
            return 0;
        }
    }
    
}