#include <iostream>
#include <vector>
 
using namespace std;
 
void findCheaters(const vector<int>& a, int n) {
    vector<int> next(n + 1, -1);
    int start = -1;
 
    // Initialize the next array and find the starter
    for (int i = 0; i < n; ++i) {
        if (a[i] == i + 1) {
            start = i + 1;
        } else {
            next[a[i]] = i + 1;
        }
    }
 
    // Trace the order from the starter
    vector<int> order;
    int current = start;
    while (current != -1) {
        order.push_back(current);
        current = next[current];
    }
 
    // Print the result
    for (int i = 0; i < order.size(); ++i) {
        cout << order[i];
        if (i != order.size() - 1) {
            cout << " ";
        }
    }
    cout << endl;
}
 
int main() {
    int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        vector<int> a(n);
        for (int i = 0; i < n; ++i) {
            cin >> a[i];
        }
        findCheaters(a, n);
    }
    return 0;
}