#include<bits/stdc++.h>
#define chmin(x,y) (x) = min((x),(y))
#define chmax(x,y) (x) = max((x),(y))
#define ld long double
using namespace std;
using ll = long long;
const ll mod = 998244353;
using Graph = vector<vector<int>>;
const vector<int> dx = {1,0,-1,0}, dy = {0,1,0,-1};

int main(){
  int T; cin >> T;
  while(T--){
    ll N,X; cin >> N >> X;
    if(2 * X < (N+1) * N) cout << -1 << endl;
    else{
      ll M = X - (N*(N+1))/2;
      ll Q = M / N, R = M % N;
      vector<ll> ans(N);
      for(int i = 1; i <= N; i++) ans[i-1] = Q + i;
      reverse(ans.begin(),ans.end());
      for(int i = 0; i < R; i++) ans[i]++;
      
      for(int i = 0; i < N; i++){
        if(i) cout << " ";
        cout << ans[i];
      } cout << endl;
    }
  }
}