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:
t = int(raw_input())
for i in range(t):
	list = [0]*1000000
	m=0
	x=0
	p=[]
	n = int(raw_input())
	k = map(int,raw_input().split())
	for j in range(n):
		list[k[j]] = list[k[j]]+1
		if(m < list[k[j]]):
			m = list[k[j]]
		if x < k[j]:
			x=k[j]
	for j in range(x+1):
		if list[x-j] == m:
				print x-j,
	print " "