Given n integers ~a_{0}, a_{1}, \ldots, a_{n-1}~ .Print all distinct elements of the given list in increasing order.

Input

• The first line is the number of testcases T (1 ≤ T ≤ 10). Each line in the following T lines describes a test case:

• Each test case starts with a positive integer n and the sequence ~a_{0}, a_{1}, \ldots, a_{n-1}~. Numbers are separated by a space.

Output

• The sequence of distinct values. The numbers are sorted in ascending order and separated by a space.

Sample Input:

2
5 1 2 3 4 4
5 5 4 9 10 2

Sample Output:

1 2 3
2 4 5 9 10