#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
#define D(x) {x;}
#else
#define D(x)
#endif
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

vector<int> f(int up, int down, ll k){
	vector<int> ans;
	if (k == 1) {
		for (int i = down; i<=up; ++i){
			ans.push_back(i);
		}
		return ans;
	}
	ll a=1;
	int i = up;
	while (a < k){
		a*=2;
		i--;
	}
	a/=2;
	for (int j = down; j<=i-1; ++j) ans.push_back(j);
	vector<int> v = f(up, i+1, k-a);
	/*
	cout << up << " " << down << " "<< k << " i: " << i << "\n";
	for (auto u:v) cout << u << " ";
	cout << "here\n";
	*/
		for (auto u:v){
		ans.push_back(u);
		if (u == (i+1)) {
			ans.push_back(i);
		}
	}
	return ans;
}

void test(){
	int n;
	ll k;
	cin >> n >> k;
	ll a=1;
	for (int i=2; i<=n; ++i){
		a*=2;
		if (a > (ll)1e18) break;
	}
	if ((a < (ll)1e18) && a < k){
		cout << "-1\n";
		return;
	}
	vector<int> v = f(n, max(1, n-70), k);
	//D(cout << "size: " << v.size() << "\n";)
	for (int i=1; i<=(n-v.size()); ++i){
		cout << i << " ";
	}
	for (auto u:v) cout << u << " ";
 	cout << "\n";
}

int main() {
  	ios::sync_with_stdio(0);
  	cin.tie(0);
  	int tt;
  	cin >> tt;
  	while (tt--) test();
}

