#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
}

void solve() {
    long long n, x;
    cin >> n >> x;
    if (x < n * (n + 1) / 2) {
        cout << -1 << endl;
        return;
    }
    vector<long long> ans(n);
    for (long long i = n - 1; i >= 0; i--) {
        ans[i] = (x - i * (i + 1) / 2 + i) / (i + 1);
        x -= ans[i];
    }
    for (int i = 0; i < n; i++) {
        cout << ans[i] << (i + 1 == n ? "\n" : " ");
    }
}
int main() {
    fast_io();
    int t;
    cin >> t;
    for (; t--;) {
        solve();
    }
}