#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll=vector<long long>;

int main() {
    ll n;
    cin>>n;
    vector<string> s(n),t(n);
    for(ll i=0;i!=n;i++){
        cin>>s[i];
    }
    for(ll i=0;i!=n;i++){
        cin>>t[i];
    }
    for(ll i=0;i!=n;i++){
        if(s[i]!=t[i]){
            cout<<i<<endl;
            cout<<s[i]<<endl;
            cout<<t[i]<<endl;
        }
    }

    system("pause");
}