#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    if (n == 1)
      cout << -1;
    else if (n % 3 != 1) {
      for (int i = 1; i < n; i++) cout << 2;
      cout << 3;
    } else {
      for (int i = 1; i < n - 1; i++) cout << 4;
      cout << 33;
    }
    cout << "\n";
  }
  return 0;
}
