#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void solve() {
	int N;
	cin >> N;
	if ((N & 3) == 0) {
		for (int i = 0; i < N / 4; i ++) {
			cout << "1001";
		}
		cout << endl;
	} else if ((N & 3) == 3) {
		cout << "110";
		for (int i = 0; i < N / 4; i ++) {
			cout << "1001";
		}
		cout << endl;
	} else {
		cout << "-1" << endl;
	}
}
int main () {
	int T;
	cin >> T;
	while (T--) {
		solve();
	}
}