#include <stdio.h>

int h, w;

int n;

char data[102][102];

void printstring( char c)
{
	if( c == 'E') printf( "Elm" );
		else if( c == 'B' ) printf( "Birch" );
		else if( c == 'F' ) printf( "Fir" );
		else if( c == 'M' ) printf( "Maple" );
		else if( c == 'C' ) printf( "Chestnut" );
		else if( c == 'O' ) printf( "Oak" );
}

int clearing[102][102];

void close( int i, int j, int clearnum )
{
	/*printf( "in close: %d, %d\n", i, j );*/
	if( i < 0 || i >= h || j < 0 || j >= w ) {return;}


	if( data[i][j] != '-' || clearing[i][j] > 0) {return;}
	else
	{
		clearing[i][j] = clearnum;
		close( i, j+1,clearnum);
		close( i, j-1,clearnum);
		close( i-1, j,clearnum);
		close( i+1, j,clearnum);
	}
}

void process()
{
	int i, j, k;
	int clear = 0;
	
	for( i = 0; i < 102; i++ )
		for( j = 0; j < 102; j++ )
		{
			clearing[i][j] = 0;
		}
	for( i = 0; i < h; i++ )
	{
		for( j = 0; j < w; j++ )
		{
			if( data[i][j] == '-' && clearing[i][j] == 0 )
			{
				/*printf( "calling close: %d, %d\n", i , j);*/
				close(i, j, clear+1);
				clear++;
			}
		}
	}
	printf( "There are %d clearings.\n" , clear );
}


void readfile()
{
	int i, j, k;
	

	scanf( " %d", &n );
	

	for( i = 0; i < n; i++ )
	{
		printf( "Data set %d: ", i+1 );
		scanf( " %d %d", &h, &w );	
		for( j = 0; j < h; j++ )
		{

			scanf( "%s", data[j] );

		}
		process();
	}
}


void main()
{
	readfile();
}