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 CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const long long C = 202020, INF = 1e19, inf = -1e19;
long long q, i, j, k, c, n, a[C];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> q;
  while (q--) {
    cin >> n;
    for (i = 0; i < n; i++) cin >> a[i];
    sort(a, a + n);
    if (n % 2 == 0) {
      j = n / 2;
      k = n / 2 - 1;
      for (i = 0; i < n / 2; i++, j++, k--) cout << a[j] << " " << a[k] << " ";
      cout << '\n';
    } else {
      j = n / 2 + 1;
      k = n / 2 - 1;
      cout << a[n / 2] << " ";
      for (i = 0; i < n / 2; i++, j++, k--) cout << a[j] << " " << a[k] << " ";
      cout << '\n';
    }
  }
  return 0;
}