#include<bits/stdc++.h>
using namespace std;
#define ll long long
int main()
{
    ll t;
    cin >> t;
    while(t--) {
        ll n;
        cin >> n;
        if(n<5) {
            cout << -1 << endl;
            continue;
        }
        ll p = n - !(n%2);
        for(int i=1;i<=p;i++) {
            if(i%2==1) {
                cout << i << ' ';
            }
        }
        ll q;
        if(p%3==0) q = 6;
        if(p%3==2) q = 4;
        if(p%3==1) q = 2;
        cout << q << ' ';
        for(int i=2;i<=n;i++) {
            if(i%2==0&&i!=q) {
                cout << i << ' ';
            }
        }
        cout << endl;
    }
}