#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define ld long double
#define pii pair<int, int>
#define f first
#define s second
#define boost() cin.tie(0), cin.sync_with_stdio(0)

const int MN = 5005;
vector<string> v;
string cur = "aaaaa", suf = "aaaaa";

void gen() {
    if (cur == "aaaaa") {
        //v.push_back(cur + suf);
        for (int i = 1; i < 26; i++) {
            for (int j = 0; j < 5; j++) {
                cur[j] = (char) ('a' + i);
                v.push_back(cur + suf);
            }
        }
    } else {
        //v.push_back(cur + suf);
        for (int i = 24; i >= 0; i--) {
            for (int j = 0; j < 5; j++) {
                cur[j] = (char) ('a' + i);
                v.push_back(cur + suf);
            }
        }
    }
}

int32_t main() {
    boost();

    gen();
    for (int i = 1; i < 26; i++) {
        for (int j = 0; j < 2; j++) {
            suf[j] = (char) ('a' + i);
            v.push_back(cur + suf);
        }
        gen();
        for (int j = 2; j < 5; j++) {
            suf[j] = (char) ('a' + i);
            v.push_back(cur + suf);
        }
        gen();
    }
    //printf("%lld\n", v.size());
    //for (string s : v) printf("%s\n", s.c_str());
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        printf("%s\n", v[i].c_str());
    }

    return 0;
}