#include <iostream>

using namespace std;

int main()
{
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	unsigned int T, N, i, j;
	unsigned long long X;

	cin >> T;
	for (i = 0; i != T; ++i)
	{
		cin >> N >> X;
		if (N * static_cast<unsigned long long>(N + 1) / 2 > X) cout << "-1\n";
		else
		{
			for (j = 1; j != N; ++j) cout << j << ' ';
			cout << N + (X - N * static_cast<unsigned long long>(N + 1) / 2) << '\n';
		}
	}

	return 0;
}