import java.io.*;
import java.text.*;
import java.util.Enumeration;
import java.util.StringTokenizer;

public class probe {
	final int ELM = 0;
	final int BIRCH = 1;
	final int FIR = 2;
	final int MAPLE = 3;
	final int CHESTNUT = 4;
	final int OAK = 5;
	
	public int height[];
	public int width[];
	public String lines[][];
	int[][][] grid;
	int[][] trees;
	
	public int value(char k) {
		switch (k) {
		case 'E': 
		case 'M': 
		case 'B': 
		case 'O': 
		case 'C': 
		case 'F': 
			return 1;
		case '-':
			return 0;
		}
		return 0;
	}
	
	public void printGrid(int data) {
		for (int i=0; i<height[data]; i++) {
			for (int j=0; j<width[data]; j++) {
				System.out.print(grid[data][i][j]+" ");
			}
			System.out.println();
		}
	}
	
	public void mark(int[][] g, int i, int j) {
		if (i > g.length-1 || i < 0) return;
		if (j > g[i].length-1 || j < 0) return;
		if (g[i][j] == 0) {
			g[i][j] = 1;
			mark(g,i-1,j);
			mark(g,i+1,j);
			mark(g,i,j-1);
			mark(g,i,j+1);
		}
	}
	
	public void output(int data) {
		for (int i=0; i<height[data]; i++) {
			for (int j=0; j<width[data]; j++) {
				grid[data][i][j] = value(lines[data][i].charAt(j));
			}
		}
//		printGrid(data);

		int num = 0;
		for (int i = 0; i < height[data]; i++) {
			for (int j = 0; j < width[data]; j++) {
				if (grid[data][i][j] == 0) {
					num++;
					mark(grid[data],i,j);
				}
			}
		}
		
//		printGrid(data);
		
		System.out.println("There are "+num+" clearings.");
		
		//top left
/*		int tlX = 0;
		int tlY = 0;
		while (tlX < width[data] || tlY < height[data]) {
			if (grid[data][tlY][tlX] == 1) break;
			tlX++;
			if (tlX == width[data]) {
				tlX = 0;
				tlY++;
			}
			if (tlY == height[data]) tlY = 0;
		}
		
		int trX = width[data];
		int trY = 0;
		while (trX < width[data] || trY < height[data]) {
			if (grid[data][tlY][tlX] == 1) break;
			tlX++;
			if (tlX == width[data]) {
				tlX = 0;
				tlY++;
			}
			if (tlY == height[data]) tlY = 0;
		}

		
		
		
		System.out.println(tlX+","+tlY);*/
		
	}
	
	public void run(String args[]) {
		try {
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
			String line = in.readLine();
			int datasets = Integer.parseInt(line);
			lines = new String[datasets][];
			//System.out.println("Datasets: "+datasets);
			height = new int[datasets];
			width = new int[datasets];
			grid = new int[datasets][][];
			
			for (int i = 0; i < datasets; i++) {
				line = in.readLine();
				StringTokenizer tok = new StringTokenizer(line, " ");
				height[i] = Integer.parseInt(tok.nextToken());
				grid[i] = new int[height[i]][];
				//System.out.println("h = "+h);
				width[i] = Integer.parseInt(tok.nextToken());
				lines[i] = new String[height[i]];
				//System.out.println("w = "+w);
				for (int j=0; j<height[i]; j++) {
					lines[i][j] = in.readLine();
					grid[i][j] = new int[width[i]];
					//System.out.println(data[i].lines[j]);
				}
			}
			
			for (int k = 0; k < datasets; k++) {
				System.out.print("Data set "+(k+1)+":");
				output(k);
			}
			
		} catch (Throwable t) {
			t.printStackTrace();
		}
		
		try {
			System.out.println("Press Enter to exit");
			System.in.read();
		} catch (IOException ioe) {
		}		
	}
	
	public static void main(String args[]) {
		probe p = new probe();
		p.run(args);
	}
}