#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#define rep(i, n) for(ll i = 0; i < n; i++)
#define rep2(i, m, n) for(ll i = m; i <= n; i++)
#define rrep(i, m, n) for(ll i = m; i >= n; i--)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define MAX(x) *max_element(all(x))
#define MIN(x) *min_element(all(x))
#define SZ(a) ((ll)(a).size())
#define bit(n, k) ((n >> k) & 1)
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
const int dx[4] = { 1, 0, -1, 0};
const int dy[4] = { 0, -1, 0, 1};
const int inf = 1e9 + 7;
const ll infll = 1e18;
//const double pi = acos(-1);
     
using Graph = vector<vector<ll>>;
using REV_PQ = priority_queue<ll, vector<ll>, greater<ll>>;
using PQ = priority_queue<ll>;

const int SIZE = 400010;
ll powll(ll n, ll x) {
    // return n ^ x;
    ll ret = 1;
    rep(i, x) ret *= n;
    return ret;
}
void OutputYesNo(bool val) {
    if (val) cout << "Yes" << endl;
    else cout << "No" << endl;
}
void OutputTakahashiAoki(bool val) {
    if (val) cout << "Takahashi" << endl;
    else cout << "Aoki" << endl;
}
void OutPutInteger(ll x) { cout << x << endl; }
void OutPutString(string x) { cout << x << endl; }

int pop_count(ll n){
    int ret = 0;
    while(n > 0){
        if(n % 2 == 1) ret++;
        n /= 2; 
    }
    return ret; 
}

using PAIR_REV_PQ = priority_queue<pair<ll, ll>, vector<pair<ll, ll>>, greater<pair<ll, ll>>>;
typedef atcoder::modint998244353 mint;
//typedef atcoder::modint1000000007 mint;
//typedef modint mint;
//typedef vector<mint> ModintVec;

/* ---------------------- ここから ---------------------- */
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
namespace mp = boost::multiprecision;
// 任意長整数型
using Bint = mp::cpp_int;
// 仮数部が10進数で1024桁の浮動小数点数型(TLEしたら小さくする)
/* ---------------------- ここまで ---------------------- */

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t; cin >> t;
    while(t--){
        ll n, x; cin >> n >> x;

        vector<ll> res;
        ll ma = infll;
        rep(i, n){
            Bint ok = 0, ng = ma;
            while(abs(ok - ng) > 1){
                Bint mid = (ok + ng) / 2;

                if(x - mid >= (mid - 1) * (mid - 2) / 2) ok = mid;
                else ng = mid;
            }

            if(x >= ok && ok > 0){
                res.push_back((ll)ok);
                x -= (ll)ok;
                ng = (ll)ok;
            }else{
                break;
            }
        }

        if(SZ(res) == n){
            rep(i, n) cout << res[i] << " ";
            cout << endl;
        }else{
            cout << -1 << endl;
        }
    }
    
}