write a go solution for Description:
green_gold_dog has an array a of length n, and he wants to find a permutation b of length n such that the number of distinct numbers in the element-wise difference between array a and permutation b is maximized.

A permutation of length n is an array consisting of n distinct integers from 1 to n in any order. For example, [2,3,1,5,4] is a permutation, but [1,2,2] is not a permutation (as 2 appears twice in the array) and [1,3,4] is also not a permutation (as n=3, but 4 appears in the array).

The element-wise difference between two arrays a and b of length n is an array c of length n, where c_i = a_i-b_i (1<=i<=n).

Input Format:
Each test contains multiple test cases. The first line contains the number of test cases t (1<=t<=4*10^4). The description of the test cases follows.

The first line of each test case contains a single integer n (1<=n<=4*10^4).

The second line of each test case contains n integers a_1,a_2,ldots,a_n (1<=a_i<=10^9).

It is guaranteed that the sum of n over all test cases does not exceed 4*10^4.

Output Format:
For each test case, output n numbers - a suitable permutation b. If there are multiple solutions, print any of them.

Note:
In the first set of input data, the element-wise difference of the arrays is [99999]. Here, there is one distinct number, and it is obvious that in an array of length one, there cannot be more than one different element.

In the second set of input data, the element-wise difference of the arrays is [-1, 0]. Here, there are two distinct numbers, and it is obvious that in an array of length two, there cannot be more than two different elements.

In the third set of input data, the element-wise difference of the arrays is [9, 0, 1]. Here, there are three distinct numbers, and it is obvious that in an array of length three, there cannot be more than three different elements.. Output only the code with no comments, explanation, or additional text.