import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		for (int z = 0; z < t; z++) {
			int n = sc.nextInt();

			int n2 = n * (n + 1) / 2;
			if (n2 % 2 == 1) {
				System.out.println(-1);
				continue;
			}

			char[] ans = new char[n];
			Arrays.fill(ans, '0');
			int goal = n2 / 2;
			int sum = 0;
			for (int i = n - 1; i >= 0; i--) {
				if (sum + i + 1 <= goal) {
					ans[i] = '1';
					sum += i + 1;
				}
			}
			System.out.println(ans);
		}
		sc.close();
	}
}