#include <iostream>
#include <vector>

using namespace std;

void solve() {
    int n;
    cin >> n;
    
    vector<int> a(n + 1);
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    
    if (a[1] == 1) {
        cout << n + 1;
        for (int i = 1; i <= n; i++) {
            cout << " " << i;
        }
        cout << "\n";
        return;
    }
    
    if (a[n] == 0) {
        for (int i = 1; i <= n; i++) {
            cout << i << " ";
        }
        cout << n + 1 << "\n";
        return;
    }
    
    for (int i = 1; i < n; i++) {
        if (a[i] == 0 && a[i + 1] == 1) {
            for (int j = 1; j <= i; j++) {
                cout << j << " ";
            }
            cout << n + 1 << " ";
            for (int j = i + 1; j <= n; j++) {
                cout << j << (j == n ? "" : " ");
            }
            cout << "\n";
            return;
        }
    }
    
    cout << -1 << "\n";
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    int t;
    cin >> t;
    while (t--) {
        solve();
    }
    
    return 0;
}