#include <bits/stdc++.h>
using namespace std;

int main() {
	long long t, n, a[114514] ;
	cin >> t;
	for (long long i = 1; i <= t; i++) {
		cin >> n;
		for (long long j = 1; j <= n; j++) {
			cin >> a[j];
		}
		for (long long j = 2; j <= n; j++) {
			for (long long k = 1; k < j; k++) {
				if (a[j] == a[k]) {
					for (long long x = j; x < n; x++) {
						a[x] = a[x + 1];
					}
					n--;
					j--;
					break;
					//ans++;
				}
			}
		}
		for (long long y = 1; y <= n; y++) {
			cout << a[y] << " ";
		}
		cout << endl;
	}
	return 0;
}

会关的！！！