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

int main() {
	string voyelles = "aei";
	voyelles.append("ou");
	cout << voyelles << endl;
	string alphabet = voyelles;
	alphabet.insert(1, "bcd");
	cout << alphabet << endl;
	alphabet.insert(5, "fgh").insert(9, "jklmn").insert(15, "pqrst");
	cout << alphabet << endl;
	alphabet+="vwxyz";
	cout << alphabet << endl;
	return 0;
}