#include <bits/stdc++.h>   using namespace std;   int n, t;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     cin >> t;     while (t--) {       cin >> n;       if (n == 1) {         cout <<  -1  << endl;         continue;       }       string ans =  2 ;       for (int i = 1; i < n; i++) ans +=  3 ;       cout << ans << endl;     }     return 0;   }   