#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>

#define ll long long

using namespace std;


int main(){
    
    int N;
    cin>>N;
    
    string S[10],T[10];
    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;
        }
    }
    return 0;
}