#include <iostream>
#include <string>
#include <vector>
using namespace std;

string passFromCounter(int counter, const vector<string>& letters);

void main()
{
	vector<string> letters;
	letters.push_back("a");
	letters.push_back("b");
	letters.push_back("c");
	letters.push_back("d");
	letters.push_back("e");

	int counter = 0;

	while (counter < 50){
		cout << passFromCounter(counter++, letters) << endl;
	}
	system("pause");
}

string passFromCounter(int counter, const vector<string>& letters){
	int num = letters.size();
	int local_mutation_step = counter;
	string pass;

	do{
		pass = letters.at((local_mutation_step % num)) + pass;
		local_mutation_step = local_mutation_step / num - 1;
	}while(local_mutation_step >= 0);

	return pass;
}