#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
    ll t;
    cin >> t;
    while(t--)
    {
        ll n;
        cin >> n;
        if(n < 4)
        {
            cout << -1 << endl;
        }
        else
        {
            deque<ll> Q;
            Q.push_back(2);Q.push_back(4);Q.push_back(1);Q.push_back(3);
            n =n-4;
            ll hi = 5,low = 0;
            while(n > 0)
            {
                if(low == 0)Q.push_front(hi);
                else Q.push_back(hi);
                hi++;
                low ^= 1; n--;
            }
            for(auto it = Q.begin(); it != Q.end(); it++)
                cout << *it << " ";
            cout << endl;
        }
    }
}