#include <bits/stdc++.h>

using namespace std;

void solve() {
    int n; cin >> n;

    vector<int> ans;

    if (n >= 5) {
        vector<int> odds, evens;
        odds.push_back(3);
        for(int i = 6; i <= n; ++i) {
            if (i%2 == 0) {
                evens.push_back(i);
            } else {
                odds.push_back(i);
            }
        }

        for(int x: odds) {
            ans.push_back(x);
        }
        for(int x: {1, 5, 4, 2}) {
            ans.push_back(x);
        }
        for(int x: evens) {
            ans.push_back(x);
        }
    }

    if (ans.empty()) {
        cout << -1 << endl;
    } else {
        for(int x: ans) {
            cout << x << " ";
        }
        cout << endl;
    }
}

int main() {
    int T; cin >> T;
    while (T--) solve();

    return 0;
}