#include <bits/stdc++.h> //#include<atcoder/all> using namespace std; //using namespace atcoder; using ll = long long; const ll mod = 1000000007; //const ll mod = 998244353; ll t, n[100009]; ll x[100009]; int main() { cin >> t; for (int i = 1; i <= t; i++)cin >> n[i] >> x[i]; for (int i = 1; i <= t; i++) { if ((n[i] * (n[i] + 1)) / 2 > x[i]) { cout << "-1" << endl; continue; } ll res = x[i] - (n[i] * (n[i] + 1)) / 2; for (int j = 1; j <= n[i]; j++) { if (j == n[i])cout << j + res << endl; else cout << j << " "; } } }