Pawan has a finite number of friends, each friend has a unique non-negative number associated with him. (0, 1, 2..)
Pawan plans to host a party and has to send notifications to his friends.
A friend attends the party if he receives at least 1 notification from Pawan.
To send notifications, Pawan buys data plans 
Pawan can send notifications using data plan \(X\) in the following way:
Let's say Data plan \(X\) costs \(Y\).
Then a friend associated with the number \(i\) will receive a notification if and only if the \(i^{th}\) bit in \(Y\) is set.
Now Pawan wonders if he can cut costs. Let him know the maximum cost that he can cut by removing at most 1 data plan and still being able to invite all the friends he could invite earlier

Input

Each test contains multiple test cases. The first line contains a single integer t (1≤t≤100) — the number of test cases. Description of the test cases follows.

The first line of each test case contains one integer \(N\) -  the number of data plans 

The second line of each test case contains \(N\) integers a1,a2,…,an — the cost of data plans array.

It is guaranteed that the sum of \(N\) over all test cases does not exceed \(10^5\)

Output

For each test case, print a line containing a single integer – the maximum possible money that Pawan can save (print 0 if no data plan can be removed)

Constraints

\(1 <= T <= 100\)

\(1 <= N <= 10^5\)

\(0<=a_i<=10^9\)