#include<bits/stdc++.h>
using namespace std;
#define i64 long long
#define i128 __int128
#define mp make_pair
#define pb push_back
#define all(x) (x).begin(), (x).end()
signed main() {
ios_base::sync_with_stdio(false); cin.tie(0);
cout << fixed << setprecision(10);
int Tests = 1; // cin >> Tests;
while (Tests --) {
int A, B; cin >> A >> B;
int ans = 0;
auto recur = [&](auto &&self, int pos, string word) -> void {
if (pos == 10) {
if (ans < B) {
ans ++;
cout << word << " ";
}
return;
}
for (int c = 0; c < 5; c ++) {
self(self, pos + 1, word + char(c + 'a'));
}
}; recur(recur, 0, "");
}
}
