#include <iostream>
using namespace std;
 
void draw(int rows, int cols)
{
	for (int i = 0; i < rows; i++)
	{
		for (int j = 0; j < cols; j++)
		{
			printf("---");
		}
		printf("-\n");
		for (int k = 0; k < 2; k++)
		{
			for (int j = 0; j < cols; j++)
			{
				printf("|  ");
			}
			printf("|\n");
		}
	}
	for (int j = 0; j < cols; j++)
	{
		printf("---");
	}
	printf("-\n");
}
 
int main() {
	int n;
	scanf("%d", &n);
	for (int i = 0; i < n; i++)
	{
		int r;
		int c;
		scanf("%d %d", &r, &c);
		draw(r, c);
	}
	return 0;
}

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

MwoyIDMKMyAyCjQgNQ==

3
2 3
3 2
4 5