Problem: You have array of n numbers a_{1}, a_{2}, …, a_{n}. 

Rearrange these numbers to satisfy |a_{1} - a_{2}| ≤ |a_{2} - a_{3}| ≤ … ≤ |a_{n-1} - a_{n}|, where |x| denotes absolute value of x. It's always possible to find such rearrangement.

Note that all numbers in a are not necessarily different. In other words, some numbers of a may be same.

You have to answer independent t test cases.

Input

The first line contains a single integer t (1 ≤ t ≤ 10^{4}) — the number of test cases.

The first line of each test case contains single integer n (3 ≤ n ≤ 10^{5}) — the length of array a. It is guaranteed that the sum of values of n over all test cases in the input does not exceed 10^{5}.

The second line of each test case contains n integers a_{1}, a_{2}, …, a_{n} (-10^{9} ≤ a_{i} ≤ 10^{9}).

Output

For each test case, print the rearranged version of array a which satisfies given condition. If there are multiple valid rearrangements, print any of them.

Example

Input


2
6
5 -2 4 8 6 5
4
8 1 4 2


Output


5 5 4 6 8 -2
1 2 4 8

Note

In the first test case, after given rearrangement, |a_{1} - a_{2}| = 0 ≤ |a_{2} - a_{3}| = 1 ≤ |a_{3} - a_{4}| = 2 ≤ |a_{4} - a_{5}| = 2 ≤ |a_{5} - a_{6}| = 10. There are other possible answers like "5 4 5 6 -2 8".

In the second test case, after given rearrangement, |a_{1} - a_{2}| = 1 ≤ |a_{2} - a_{3}| = 2 ≤ |a_{3} - a_{4}| = 4. There are other possible answers like "2 4 8 1".

Solution (in PYTHON3):

Solution:
def run(n, list_elements):
	newList = []
	list_elements.sort()

	medInd = len(list_elements)//2
	printCount = 1
	totalCount = len(list_elements)
	print(list_elements[medInd], end = ' ')

	printSpace = True
	desloc = 1
	while totalCount != printCount:
		if medInd - desloc >= 0:
			print(list_elements[medInd - desloc], end = '')
			printCount += 1
			if totalCount != printCount:
				print(' ', end = '')
		if medInd + desloc < len(list_elements):
			print(list_elements[medInd + desloc], end = '')
			printCount += 1
			if totalCount != printCount:
				print(' ', end = '')
		desloc += 1
	print('')
	return

i = int(input())
for _ in range(i):
	n = int(input())
	lst = list(map(int, input().split()))
	run(n, lst)