#include <bits/stdc++.h>
using namespace std;
int main(){
	int T;
	cin >> T;
	while (T--){
		int N;
		long long X;
		cin >> N >> X;
		if ((long long) N * (N + 1) / 2 > X){
			cout << -1 << endl;
			continue;
		}
		vector<long long> ans(N);
		iota(ans.begin(), ans.end(), 1);
		X -= (long long) N * (N + 1) / 2;
		reverse(ans.begin(), ans.end());
		for (int i = 0; i < N; i++){
			ans[i] += X / N;
		}
		X %= N;
		for (int i = 0; i < X; i++){
			ans[i]++;
		}
		for (int i = 0; i < N; i++){
			cout << ans[i];
			if (i + 1 < N){
				cout << ' ';
			}
		}
		cout << endl;
	}
}