#include <iostream>

using namespace std;

int main()
{
	int x, y, i;

	do
	{
		cout << "vvedite 2-oe chislo" << endl;
		cin >> i;
		if (i > 99 || i < 10)
			cout << "vv 2-xzn chislo" << endl;
		else
		{
			x = i % 10;
			y = i / 10;
			if (x == 4 || x == 7 || y == 4 || y == 7)
				cout << "vhodiat 4, 7" << endl;
			else
				cout << "ne vhodiat 4, 7" << endl;
			if (x == 3 || x == 6 || x == 9 || y == 3 || y == 6 || y == 9)
				cout << "vhodiat 3, 6, 9" << endl;
			else
				cout << "ne vhodiat 3,6,9" << endl;
		}
	} while (i != 0);

	return 0;
}