include

include

include

using namespace std;

int L, C; vector letters; vector password; int vowel_count, consonant_count; int output_count = 0; bool is_vowel(char c) {

return c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u';

} void generate(int index) {

if (output_count >= 25000) return;
if (password.size() == L) {
    if (vowel_count >= 1 && consonant_count >= 2) {
        for (char c : password) {
            cout << c;
        }
        cout << endl;
        output_count++;
    }
    return;
}
if (index >= C) return;
char current = letters[index];
password.push_back(current);
if (is_vowel(current)) {
    vowel_count++;
} else {
    consonant_count++;
}
generate(index + 1);
password.pop_back();
if (is_vowel(current)) {
    vowel_count--;
} else {
    consonant_count--;
}
generate(index + 1);

}

int main() {

cin >> L >> C;
letters.resize(C);

for (int i = 0; i < C; i++) {
    cin >> letters[i];
}
sort(letters.begin(), letters.end());

vowel_count = 0;
consonant_count = 0;
output_count = 0;

generate(0);

return 0;

}