#include <iostream>
using namespace std;
int main(){
    int N;
    string s[10],t;
    cin >> N;
    for(int i=0;i<N;i++)cin >> s[i];
    for(int pos=1;pos<=N;pos++){
        cin >> t;
        if(s[pos-1]!=t){
            cout << pos << endl << s[pos-1] << endl << t << endl;
            break;
        }
    }
    return 0;
}