func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     ;     long long t;     cin >> t;     while (t--) {       long long n;       cin >> n;       if (n <= 3)         cout << -1 <<   n ;       else {         if (n & 1) {           for (long long i = 1; i <= n; i++) {             if (i & 1) cout << i <<    ;           }           cout << n - 3 <<     << n - 1 <<    ;           for (long long i = n - 4; i >= 1; i--) {             if ((i & 1) == 0) cout << i <<    ;           }           cout <<   n ;         } else {           for (long long i = 1; i <= n; i++) {             if ((i & 1) == 0) cout << i <<    ;           }           cout << n - 3 <<     << n - 1 <<    ;           for (long long i = n - 4; i >= 1; i--) {             if ((i & 1)) cout << i <<    ;           }           cout <<   n ;         }       }     }     return 0;   }   