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=input()
for i in range(t):
	n= input()
	d={}
	s=map(int,raw_input().strip().split())
	for j in s:
		d[j]=d.get(j,0)+1
	l=0
	for key in d.keys():
		if d[key]>l:
			l=d[key]
	lst=[]
	for j in d.keys():
		if d[j]==l:lst.append(j)
	lst.sort()
	lst.reverse()
	print " ".join(map(str,lst))