#include<stdio.h>
int main()
{
	int n;
	scanf("%d", &n);
	int i, j;
	int k[22], l[22][22];
	for (i = 0; i < n; i++)
	{
		scanf("%d", &k[i]);
		for (j = 0; j < k[i]; j++)
			scanf("%d", &l[i][j]);
	}
	for (i = 0; i < n; i++)
	{
		for (j = 0; j < k[i] - 1; j++)
		{
			if (l[i][j] < l[i][j + 1])
			{
				l[i][j] ^= l[i][j + 1];
				l[i][j + 1] ^= l[i][j];
				l[i][j] ^= l[i][j + 1];
				if (j > 0)
					j -= 2;
			}
		}
	}
	for (i = 0; i < n; i++)
	{
		for (j = 0; j < k[i] - 1; j++)
			printf("%d ", l[i][j]);
		printf("%d\n", l[i][k[i] - 1]);
	}
	return 0;
}