#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

ll INF=2e18;

void solve() {
ll N;cin>>N;
ll s=(1+N)*N/2;
if(s%2!=0) {
  cout<<-1<<endl;
  return ;
}

vector<ll> ans(N+1);
ll noko=s/2;
for(ll j=N;j>=1;j--) {
  if(noko-j>=0) {
    noko-=j;
    ans[j]=1;
  }
}

for(ll i=1;i<=N;i++) cout<<ans[i];
cout<<endl;


}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  ll t;cin>>t;
  for(ll i=0;i<t;i++) {
    solve();
  }

}