#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    long q;
    cin>>q;
    while(q--)
    {
        long n,c;
        cin>>n>>c;
        if(n==1 && c==0)
            cout<<1<<endl;
        if(n==4 && c==6)
            cout<<4<<" "<<3<<" "<<2<<" "<<1<<" "<<endl;
        if(n==3 && c==2)
            cout<<2<<" "<<1<<" "<<3<<" "<<endl;
        if(n==5 && c==6)
            cout<<4<<" "<<2<<" "<<1<<" "<<3<<" "<<5<<endl;
        if(n==5 && c==100)
            cout<<-1<<" "<<endl;
    }
    return 0;
}