// wla a m7ma ma7ros
 
#include <algorithm>
#include <bitset>
#include <complex>
#include <cassert>
#include <deque>
#include <iostream>
#include <iomanip>
#include <istream>
#include <iterator>
#include <map>
#include <math.h>
#include <memory>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <string.h>
#include <time.h>
#include <vector>
 
#define INF_MAX 2147483647
#define INF_MIN -2147483647
#define INF_LL 4000000000000000000LL
#define INF 1000000000
#define EPS 1e-8
#define LL long long
#define mod 1000000007
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define setzero(a) memset(a,0,sizeof(a))
#define setdp(a) memset(a,-1,sizeof(a))
#define bits(a) __builtin_popcountll(a)
 
using namespace std;

LL dp[100005];
LL sum[100005];

int main() {
    dp[0] = dp[1] = 1;
    sum[1] = 1;
    for (int i=2;i<=100000;i++) {
        dp[i] = min(sum[i - 1] + 1, INF_LL);
        sum[i] = min(INF_LL, sum[i - 1] + dp[i]);
    }
    int t;
    cin >> t;
    while (t--) {
        int n;
        LL k;
        scanf("%d %lld", &n, &k);
        if (k > dp[n]) {
            printf("-1\n");
            continue;
        }
        int offset = 0;
        while (n > 0) {
            for (int i=1;i<=n;i++) {
                if (i < n && dp[n - i] < k) {
                    k -= dp[n - i];
                } else {
                    for (int j=i;j>0;j--) {
                        printf("%d ", offset + j);
                    }
                    offset += i;
                    n -= i;
                    break;
                }
            }
        }
        printf("\n");
    }
    return 0;
}
