#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
using namespace std;
using ll = long long;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int t;
    cin >> t;
    while(t--){
        ll n,x;
        cin >> n >> x;
        ll a = n*(n+1)/2;
        if(a>x){
            cout << -1 << endl;
            continue;
        }
        ll b = (x-a)/n;
        ll c = x-(b*n+a);
        rep(i,n) {
            cout << (n-i)+b+(c>0) << " ";
            c--;
        }
        cout << endl;
    }
}