#include <iostream>
#include <math.h>
#include <stdio.h>
#include <string>
#include <string.h>
#include <algorithm>
#include <cmath>
#include <limits>
#include <sstream>

using namespace std;

int main (void)
{
	int n;

	cin >> n;

	int k = 0;

	if (n != 0)
	{
		k = n / 100;
		cout << "ai1333";

		for (int i = 0; i < k; i++)
		{
			cout << '3';
		}
		cout << endl;
	}
	else
	{
		cout << "ai1333" << endl;
	}
}

