include

using std::cout; using std::cin; using std::endl;

int main() {

int a = 0, b = 0;
cin >> a >> b;

for (int i = a; i <= b; ++i)
{
	bool x = true;
	for (int j = 2; j * j <= i; ++j)
	{
		if (i % j == 0)
		{
			x = false;
			break;
		}
	}

	if (x&&i!=1)
	{
		cout << i <<endl;
	}
}

}