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:
for _ in xrange(int(raw_input())):
	l=input();	A=map(int,raw_input().split());	C,m=[0]*1000005,0;
	for i in xrange(l):
		C[A[i]]+=1;
		if C[A[i]]>m:		m=C[A[i]];	Q=[];	Q.append(A[i]);
		elif C[A[i]]>=m:	Q.append(A[i]);
	l=len(Q);	Q.sort();	Q.reverse();
	for i in xrange(l):
		print Q[i],
	print