Problem: Write a program to find the mode of a given list of integers. Mode of a number is defined as the number which is most frequently occured. 
For example: 
L = {1,2,2,3} // Here mode is 2(most frequently occured)  

It is possible that multiple answers are possible for a list. In that case print all possible answers in non-increasing order.

Input:
First Line of input contains an integer t represeting the number of test cases, Where first line of each test case has an integers N - number of integers in list, Next line contains N integers.

Output:
print all the possible modes in non-increasing order.

Constraints:
1 ≤ t ≤ 100
1 ≤ N<100000
1 ≤ a[i] ≤ 1000000

SAMPLE INPUT
2
5
1 2 2 2 2 
6
1 2 2 3 3 4

SAMPLE OUTPUT
2 
3 2

Solution (in PYTHON):

Solution:
import operator

for i in range(input()):
	n = input()
	final = map(int,raw_input().split())
	d = {}
	for i in final:
		if i in d:
			d[i] += 1
		else:
			d[i] = 1
	t = max(d.values())
	
	f1 = [x for x,y in d.items() if y == t]
	f1.sort(reverse=True)
	
	t = len(f1)
	
	for j in range(t):
		if j == t-1:
			print f1[j]
		else:
			print f1[j],