Stupid Password Generator

#include <iostream>
#include <cmath>

using namespace std;

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

    for (int a = 1; a <= n; a++) {
        for (int b = 1; b <= n; b++) {
            for (int c = 97; c < 97 + l; c++) {
                for (int d = 97; d < 97 + l; d++) {
                    for (int e = max(a, b) + 1; e <= n; e++) {
                        cout << a << b << (char)c << (char)d << e << ' ';
                    }
                }
            }
        }
    }

    return 0;
}