#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    if (n == 1) {
      cout << -1 << endl;
    } else if (n % 3 == 1) {
      cout << "5";
      for (int i = 2; i < n; ++i) {
        cout << '4';
      }
      cout << "3\n";
    } else {
      for (int i = 1; i < n; ++i) {
        cout << '2';
      }
      cout << "3\n";
    }
  }
}
