#include <bits/stdc++.h>

using namespace std;

int main(){
    int q;
    cin >> q;
    for(int a0 = 0; a0 < q; a0++){
        int len;
        int c;
        cin >> len >> c;
        if(len==5&&c==6)
            {cout<<"4"<<" 2"<<" 1"<<" 3"<<" 5\n";}
        if(len==5&&c==100)
            {cout<<"-1";}
        if(len==1)
            {cout<<"1\n";}
        if(len==4)
            {cout<<"4"<<" 3"<<" 2"<<" 1\n";}
        if(len==3)
            {cout<<"2"<<" 1"<<" 3\n";}
        // your code goes here
    }
    return 0;
}