#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)(s); i < (int)(e); ++i)
#define all(a) (a).begin(),(a).end()

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    
    int T;
    cin >> T;
    
    rep(testcase, 0, T) {
        ll N, X;
        cin >> N >> X;
        
        ll sum = N*(N + 1) / 2;
        
        if (sum > X) {
            cout << -1 << '\n';
            continue;
        }
        
        ll b = (X - sum) / N;
        int rest = (X - sum) % N;
        
        rep(i, 0, N) {
            cout << (N - i) + b + (i < rest ? 1 : 0) << (i == N - 1 ? '\n' : ' ');
        }
    }
}