#include <iostream>
using namespace std;
int main(void){
    int n;cin>>n;
    string lst1[n],lst2[n];
    for(int i=0;i<n;i++)cin>>lst1[i];
    for(int i=0;i<n;i++)cin>>lst2[i];
    for(int i=0;i<n;i++){
        if(lst1[i]!=lst2[i]){
            cout<<i+1<<endl<<lst1[i]<<endl<<lst2[i]<<endl;
        }
    }
}