.dart

import 'dart:io';

void main() {
  int tc = int.parse(stdin.readLineSync()!);
  while (tc != 0) {
    tc--;
    int n = int.parse(stdin.readLineSync()!);
    List<int> v = stdin.readLineSync()!.split(' ').map(int.parse).toList();
    List<int> v2 = List.filled(231, 0);
    for (int i = 0; i < n; i++) {
      v2[v[i]]++;
    }
    String b = "";
    for (int i = 20; i <= 230; i++) {
      if (v2[i] == 0) continue;
      for (int j = 0; j < v2[i]; j++) {
        b += "$i ";
      }
    }
    b = b.substring(0, b.length - 1);
    print(b);
  }
}