//g++ -std=c++11 -Wall -O2 -o main.exe main.cpp
//g++ -std=c++14 -Wall -O2 -o main.exe main.cpp

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <iostream>
#include <iomanip>
#include <string>
#include <vector>
#include <functional>
#include <algorithm>
#include <complex>
#include <numeric>
#include <queue>
#include <stack>
#include <tuple>

using namespace std;

#define spc " "
#define com ", "

typedef long long ll;
typedef long double ld;
typedef pair<int, int> p_ii;
typedef tuple<int, int, int> tup;

//------------------------------------------------------------------------------

int main(){
    int n;
    cin >> n;

    string s;
    srand(time(NULL));
    for(int i = 0; i < n; i++){
        s += 'a';
        for(int i = 1; i <= 6; i++){
            s += ('a' + rand() % 26);
        }
        s += (i == n - 1 ? 'n' : 'a');
        cout << s << endl;
        s = "";
    }

    return 0;
}