Given a linked list of N nodes. The task is to remove duplicates from the given list (if exists).

For example if the linked list is 11->11->11->21->43->43->60, then linked list should be converted to 11->21->43->60.

Note: Try not to use extra space. Expected time complexity is O(N).

Input:
First line of input contains number of testcases T. For each testcase, first line of input contains length of linked list and next line contains the linked list data.

Output:
For each testcase, there will be a single line of output which contains linked list with no duplicates.

User Task:
The task is to complete the function removeDuplicates() which should remove the duplicates from linked list.

Constraints:
1 <= T <= 100
1 <= N <= 100

Example:
Input
2
4
2 2 4 5
5
2 2 2 2 2

Output
2 4 5
2

Explanation:
Testcase 1: In the given linked list 2 ->2 -> 4-> 5, only 2 occurs more than 1 time.
 

** For More Input/Output Examples Use 'Expected Output' option **