家妮0926_1

#include <iostream>
using namespace std;
int main()
{
	int m, n;
	while (cin >> m >> n)
	{
		if (m < n)
		{
			cout << "-1\n";
		}
		else
		{
			int index = 0;
			cout << "1";
			while (1)
			{
				index += n;
				if (index + n <= m)
				{
					cout << ", " << index + 1;
				}
				if (index + n > m)
				{
					cout << '\n';
					break;
				}
			}
		}
	}
}