#include<bits/stdc++.h>

using namespace std;

#define all(x) begin(x), end(x)
#define sz(x) static_cast<int>((x).size())
#define int long long



signed main() {

        ios::sync_with_stdio(0);
        cin.tie(0);


        int t;
        cin >> t;

        while (t--) {

                int n, s;
                cin >> n >> s;

                if (s & 1 || n > s || n == 1) {
                        cout << -1 << "\n";
                        continue;
                }

                int dp[30] = {0};
                for (int i = 0; i < 30; i++) {
                        if (s & (1ll << i)) dp[i]++;
                }

                for (int i = 29; i > 0; i--) {
                        if (dp[i] & 1) dp[i - 1] += 2, dp[i]--;
                        int ex = (n - dp[i - 1]) / 2;
                        if (ex & 1) ex--;
                        dp[i - 1] += min(ex, dp[i]) * 2;
                        dp[i] -= min(ex, dp[i]);
                }

                int a[n] = {0};
                int i = 0;
                int cur = 1;
                for (auto u : dp) {
                        for (int j = 0; j < u; j++, i++) {
                                if (i == n) i = 0;
                                a[i] += cur;
                        }
                        cur *= 2;
                }

                bool ps = 1;
                for (auto u : a) {
                        if (u == 0) ps = 0;
                }
                if (!ps) {
                        cout << -1 << "\n";
                        continue;
                }

                for (auto u : a) cout << u << " ";
                cout << "\n";


        }


}