// clang-format off
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <bitset>
#include <vector>
#include <algorithm>
#include <random>
#include <map>
#include <string>
#include <set>
#include <deque>
#include <string>
#include <cassert>

#pragma GCC optimize("Ofast")

using namespace std;
const int N = 1e6 + 7, MOD = 1e9 + 7, C = 1000, C2 = 10;
const long long INF = 1e18;
const long double EPS = 1e-9;
int x, n;
string s;

vector<string> answ;
set<string> a;

int diff(string s1) {
    int answ = 0;
    for (int i = 0; i < n; i++) {
        if (s1[i] != s[i]) {
            answ++;
        }
    }
    return answ;
}
signed main() {
#ifdef _DEBUG
    freopen("input.txt", "r", stdin);
#else
    std::ios::sync_with_stdio(false);
    cin.tie(0);
#endif
    cin >> x >> s;
    n = s.size();
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            for (int k = 0; k < n; k++) {
                string s1 = s;
                s1[i] = s[j];
                s1[j] = s[k];
                s1[k] = s[i];
                if (diff(s1) <= 3 && diff(s1) != 0 && a.find(s1) == a.end() && s1 != s) {
                    if (answ.size() < x) {
                        answ.push_back(s1);
                        a.insert(s1);
                    }
                }
            }
        }
    }
    assert(answ.size() == x);
    for (auto u : answ) {
        cout << u << '\n';
    }
}