#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
//using mint = modint998244353;
//using mint = modint1000000007;
typedef long long ll;
typedef unsigned long long ull;
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int MAX = 1e9;
const int MIN = -1*1e9;
const ll MAXLL = 1e18;
const ll MINLL = -1*1e18;
//const ll MOD = 998244353;
//const ll MOD = 1000000007;

int main()
{
    int T; cin >> T;
    for(int t = 0; t < T; t++)
    {
        ll A,B; cin >> A >> B;
        if((1+A)*A/2 > B)
        {
            cout << -1 << endl;
            continue;
        }
        for(int i = 1; i < A; i++)
        {
            cout << i << " ";
        }
        cout << B-((1+(A-1))*(A-1)/2) << endl;
    }
    return 0;
}