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()
	ar=map(int,raw_input().split())
	d={}
	v=0
	for i in ar:
		if i in d:
			d[i]+=1
			if d[i]>v:
				v=d[i]
		else:
			d[i]=1
	ar=[]
	for i in d:
		if d[i]==v:
			ar.append(i)
	ar.sort()
	for i in ar[::-1]:
		print i,
	print