public static void main(String[] args) throws IOException {

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

System.out.printf("숫자 입력 : ");

StringBuilder stringBuilder = new StringBuilder();

int n = Integer.parseInt(bufferedReader.readLine());

int[] directionX = {0, 1, 1, 1, 0, -1, -1, -1};

int[] directionY = {1, 1, 0, -1, -1, -1, 0, 1};

for (int i = 0; i < n; i++) {

int eachN = Integer.parseInt(bufferedReader.readLine());

String[] lines = new String[eachN];

for (int j = 0; j < eachN; j++) {

lines[j] = bufferedReader.readLine();

}

int max = 0;

for (int x = 0; x < eachN; x++) {

for (int y = 0; y < eachN; y++) {

boolean buildingOnlyExists = true;

for (int j = 0; j < directionX.length; j++) {

int nextX = x + directionX[j];

int nextY = y + directionY[j];

if (0 <= nextX && nextX < eachN && 0 <= nextY && nextY < eachN) {

char c = lines[nextX].charAt(nextY);

if (c == 'G') {

buildingOnlyExists = false;

break;

}

}

}

if (buildingOnlyExists) {

int count = 0;

for (int j = 0; j < eachN; j++) {

char c = lines[x].charAt(j);

if(c == 'B')

count++;

}

for (int j = 0; j < eachN; j++) {

char c = lines[j].charAt(y);

if(c == 'B')

count++;

}

count--;

max = Math.max(max, count);

}

}

}

stringBuilder.append("#" + (i+1) + " " + max + "\n");

}

System.out.println(stringBuilder.toString());

}