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 JAVA):

Solution:
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.io.IOException;
import java.util.Random;
import java.io.InputStream;

/**
 * Built using CHelper plug-in Actual solution is at the top
 *
 * @author MakeMoroccoGreatAgain
 */
public class Main {
  public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    PrintWriter out = new PrintWriter(outputStream);
    BSortedAdjacentDifferences solver = new BSortedAdjacentDifferences();
    solver.solve(1, in, out);
    out.close();
  }

  static class BSortedAdjacentDifferences {
    public final void solve(int testNumber, InputReader in, PrintWriter out) {
      int t = in.nextInt();
      while (t-- > 0) {
        int n = in.nextInt();
        int[] a = in.nextIntArray(n);
        ArrayShuffler.shuffle(a);
        Arrays.sort(a);

        int[] ans = new int[n];
        int i = 0, j = n - 1, k = n - 1;
        boolean less = true;
        while (k >= 0) {
          ans[k] = a[i];
          --k;
          if (k >= 0) {
            ans[k] = a[j];
            --k;
          }

          i++;
          j--;
          less = !less;
        }
        out.println(StringUtils.join(" ", ans));
      }
    }
  }

  static class StringUtils {
    private StringUtils() {
      throw new RuntimeException("DON'T");
    }

    public static final String joinRange(String delimiter, int from, int to, int[] a) {
      StringBuilder sb = new StringBuilder();
      sb.append(a[from]);
      for (int i = from + 1; i <= to; i++) {
        sb.append(delimiter).append(a[i]);
      }
      return sb.toString();
    }

    public static final String join(String delimiter, int... a) {
      return joinRange(delimiter, 0, a.length - 1, a);
    }
  }

  static final class InputReader {
    private final InputStream stream;
    private final byte[] buf = new byte[1 << 16];
    private int curChar;
    private int numChars;

    public InputReader() {
      this.stream = System.in;
    }

    public InputReader(final InputStream stream) {
      this.stream = stream;
    }

    private final int read() {
      if (this.numChars == -1) {
        throw new UnknownError();
      } else {
        if (this.curChar >= this.numChars) {
          this.curChar = 0;

          try {
            this.numChars = this.stream.read(this.buf);
          } catch (IOException ex) {
            throw new InputMismatchException();
          }

          if (this.numChars <= 0) {
            return -1;
          }
        }

        return this.buf[this.curChar++];
      }
    }

    public final int nextInt() {
      int c;
      for (c = this.read(); isSpaceChar(c); c = this.read()) {}

      byte sgn = 1;
      if (c == 45) { // 45 == '-'
        sgn = -1;
        c = this.read();
      }

      int res = 0;

      while (c >= 48 && c <= 57) { // 48 == '0', 57 == '9'
        res *= 10;
        res += c - 48; // 48 == '0'
        c = this.read();
        if (isSpaceChar(c)) {
          return res * sgn;
        }
      }

      throw new InputMismatchException();
    }

    private static final boolean isSpaceChar(final int c) {
      return c == 32 || c == 10 || c == 13 || c == 9
          || c == -1; // 32 == ' ', 10 == '\n', 13 == '\r', 9 == '\t'
    }

    public final int[] nextIntArray(final int n) {
      int[] arr = new int[n];
      for (int i = 0; i < n; i++) {
        arr[i] = nextInt();
      }
      return arr;
    }
  }

  static class ArrayShuffler {
    private static Random r = new Random(System.nanoTime() * 21);

    private ArrayShuffler() {
      throw new RuntimeException("DON'T");
    }

    public static int[] shuffle(int[] arr, int from, int to) {
      int n = to - from + 1;
      for (int i = from; i <= to; i += 4) {
        int p = r.nextInt(n + 1) + from;
        if (p <= to) {
          int temp = arr[i];
          arr[i] = arr[p];
          arr[p] = temp;
        }
      }
      return arr;
    }

    public static int[] shuffle(int[] arr) {
      return shuffle(arr, 0, arr.length - 1);
    }
  }
}