Problem: You are given an array [a_1, a_2, ..., a_n] such that 1 ≤ a_i ≤ 10^9. Let S be the sum of all elements of the array a.

Let's call an array b of n integers beautiful if:

  * 1 ≤ b_i ≤ 10^9 for each i from 1 to n; 
  * for every pair of adjacent integers from the array (b_i, b_{i + 1}), either b_i divides b_{i + 1}, or b_{i + 1} divides b_i (or both); 
  * 2 ∑ _{i = 1}^{n} |a_i - b_i| ≤ S. 



Your task is to find any beautiful array. It can be shown that at least one beautiful array always exists.

Input

The first line contains one integer t (1 ≤ t ≤ 1000) — the number of test cases.

Each test case consists of two lines. The first line contains one integer n (2 ≤ n ≤ 50).

The second line contains n integers a_1, a_2, ..., a_n (1 ≤ a_i ≤ 10^9).

Output

For each test case, print the beautiful array b_1, b_2, ..., b_n (1 ≤ b_i ≤ 10^9) on a separate line. It can be shown that at least one beautiful array exists under these circumstances. If there are multiple answers, print any of them.

Example

Input


4
5
1 2 3 4 5
2
4 6
2
1 1000000000
6
3 4 8 1 2 3


Output


3 3 3 3 3
3 6
1 1000000000
4 4 8 1 3 3

Solution (in JAVA):

Solution:
import java.io.*;
import java.util.*;
import java.math.*;

public class IDE {

    public void prayGod() throws IOException {
        int t = ipar();
        while (t-- > 0) {
            int n = ipar();
            long[] a = lapar(n);
            long[] b = new long[n];

            long total = 0, curr_total = 0;
            for (int i =0; i<n; i++) total += a[i];

            for (int i = 0; i<n; i++) {
                if (i%2==1) b[i] = a[i];
                else b[i] = 1;
                curr_total += Math.abs(a[i] - b[i]);
            }

            if (2*curr_total <= total) {
                printArray(b);
                continue;
            }

            for (int i = 0; i<n; i++) {
                if (i%2==0) b[i] = a[i];
                else b[i] = 1;
            }

            printArray(b);
        }
    } 

    static final boolean RUN_TIMING = false;
    static final boolean AUTOFLUSH = false;
    static final boolean FILE_INPUT = false;
    static final boolean FILE_OUTPUT = false;

    static char[] inputBuffer = new char[1 << 20];
    static PushbackReader in = new PushbackReader(new BufferedReader(new InputStreamReader(System.in)), 1 << 20);
    static PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)), AUTOFLUSH);

    // int data-type
    public int ipar() throws IOException { return Integer.parseInt(spar()); }
    public int[] iapar(int n) throws IOException {
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) arr[i] = ipar();
        return arr;
    }
    public void sort(int[] a) {
        shuffle(a);
        Arrays.sort(a);
    }
    public static void printArray(int[] arr) {
        for (int i = 0; i<arr.length; i++) out.print(arr[i] + " ");
        out.println();
    }

    // long data-type
    public long lpar() throws IOException { return Long.parseLong(spar()); }
    public long[] lapar(int n) throws IOException {
        long[] arr = new long[n];
        for (int i = 0; i < n; i++) arr[i] = lpar();
        return arr;
    }
    public static void printArray(long[] arr) {
        for (int i = 0; i<arr.length; i++) out.print(arr[i] + " ");
        out.println();
    }
    public void sort(long[] a) {
        shuffle(a);
        Arrays.sort(a);
    }

    // double data-type
    public double dpar() throws IOException {
        return Double.parseDouble(spar());
    }
    public double[] dapar(int n) throws IOException {
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) arr[i] = dpar();
        return arr;
    }
    public static void printArray(double[] arr) {
        for (int i = 0; i<arr.length; i++) out.print(arr[i] + " ");
        out.println();
    }

    // Generic type
    public <T> void sort(T[] a) {
        shuffle(a);
        Arrays.sort(a);
    }
    public static <T> void printArray(T[] arr) {
        for (int i = 0; i<arr.length; i++) out.print(arr[i] + " ");
        out.println();
    }

    public String spar() throws IOException {
        int len = 0;
        int c;
        do {
            c = in.read();
        } while (Character.isWhitespace(c) && c != -1);
        if (c == -1) {
            throw new NoSuchElementException("Reached EOF");
        }
        do {
            inputBuffer[len] = (char)c;
            len++;
            c = in.read();
        } while (!Character.isWhitespace(c) && c != -1);
        while (c != '\n' && Character.isWhitespace(c) && c != -1) {
            c = in.read();
        }
        if (c != -1 && c != '\n') {
            in.unread(c);
        }
        return new String(inputBuffer, 0, len);
    }

    public String linepar() throws IOException {
        int len = 0;
        int c;
        while ((c = in.read()) != '\n' && c != -1) {
            if (c == '\r') {
                continue;
            }
            inputBuffer[len] = (char)c;
            len++;
        }
        return new String(inputBuffer, 0, len);
    }

    public boolean haspar() throws IOException {
        String line = linepar();
        if (line.isEmpty()) {
            return false;
        }
        in.unread('\n');
        in.unread(line.toCharArray());
        return true;
    }

    public void shuffle(int[] arr) {
        int n = arr.length;
        for (int i = 0; i < n; i++) {
            int j = (int)(Math.random() * (n-i));
            int temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }

    public void shuffle(long[] arr) {
        int n = arr.length;
        for (int i = 0; i < n; i++) {
            int j = (int)(Math.random() * (n-i));
            long temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }

    public void shuffle(Object[] arr) {
        int n = arr.length;
        for (int i = 0; i < n; i++) {
            int j = (int)(Math.random() * (n-i));
            Object temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }

    public static void main(String[] args) throws IOException {
        if (FILE_INPUT) in = new PushbackReader(new BufferedReader(new FileReader(new File("test.txt"))), 1 << 20);
        if (FILE_OUTPUT) out = new PrintWriter(new FileWriter(new File("output.txt")));

        long time = 0;
        time -= System.nanoTime();
        new IDE().prayGod();
        time += System.nanoTime();
        
        if (RUN_TIMING) System.out.printf("%.3f ms%n", time / 1000000.0);
        
        out.flush();
        in.close();
    }
}