#include <bits/stdc++.h>
//#include<atcoder/all>
using namespace std;
//using namespace atcoder;
using ll = long long;
const ll mod = 1000000007;
//const ll mod = 998244353;
ll t, n[100009];
ll x[100009];
int main() {
	cin >> t;
	for (int i = 1; i <= t; i++)cin >> n[i] >> x[i];
	for (int i = 1; i <= t; i++) {
		if ((n[i] * (n[i] + 1)) / 2 > x[i]) {
			cout << "-1" << endl;
			continue;
		}
		ll res = x[i] - (n[i] * (n[i] + 1)) / 2;
		for (int j = 1; j <= n[i]; j++) {
			if (j == n[i])cout << j + res << endl;
			else cout << j << " ";
		}
	}
}