func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long t, n, i;     cin >> t;     while (t--) {       cin >> n;       if (n == 1) {         cout <<  -1 n ;         continue;       }       cout <<  2 ;       for (i = 2; i <= n; i++) {         cout <<  9 ;       }       cout << endl;     }     return 0;   }   