#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

void solve(){
    ll n, x;
    cin >> n >> x;
    ll sum = n*(n+1)/2;
    if(sum>x) {
        cout << -1 << endl;
        return;
    }
    ll d = x- sum;
    ll a = d/n;
    ll b = d%n;
    rep(i,n){
        if(b){
            cout << n-i + a + 1;
            --b;
        }
        else{
            cout << n-i + a;
        }
        if(i!=n-1) cout << " ";
    }
    cout << endl;
}

int main()
{
    int t;
    cin >> t;
    rep(i,t){
        solve();
    }
    return 0;
}