#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    vector<string> s(n),t(n);
    for(int i=0;i<n;++i)cin>>s[i];
    for(int i=0;i<n;++i)cin>>t[i];
    for(int i=0;i<n;++i){
        if(s[i]!=t[i]){
            cout<<i+1<<endl;
            cout<<s[i]<<endl;
            cout<<t[i]<<endl;
        }
    }
}