#include <iostream>
#include <queue>

using namespace std;

deque<int> dq;

int main()
{
    int t; cin >> t;
    for(; t >= 1; t --)
    {
        int n; cin >> n;
        if(n <= 4)
            cout << -1 << '\n';
        else{
            dq.push_back(1);
            dq.push_back(3);
            dq.push_back(5);
            dq.push_back(4);
            dq.push_back(2);


            for(int i = 6; i <= n; i ++)
                if(i % 2 == 0)
                    dq.push_back(i);
                else
                    dq.push_front(i);

            while(!dq.empty()){
                cout << dq.front() << " ";
                dq.pop_front();
            }

            cout << '\n';
        }
    }
    return 0;
}