/* -*- coding: utf-8 -*-
 *
 * 2608.cc:  No.2608 Divide into two - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

const int MAX_N = 100;

/* typedef */

/* global variables */

int as[MAX_N];

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int n;
    scanf("%d", &n);

    int s = n * (n + 1) / 2;
    if (s & 1) { puts("-1"); continue; }

    int t = s / 2;
    fill(as, as + n, 0);

    for (int i = n; i >= 1; i--)
      if (t >= i) {
	as[i - 1] = 1;
	t -= i;
      }

    for (int i = 0; i < n; i++) printf("%d", as[i]);
    putchar('\n');
  }

  return 0;
}