knights_game

def next_moves(k_row, k_col, size):
    next_possible_moves = []
    valid_range = range(0, size)
    if k_row - 1 in valid_range and k_col - 2 in valid_range:
        next_possible_moves.append((k_row - 1, k_col - 2))

    if k_row - 2 in valid_range and k_col - 1 in valid_range:
        next_possible_moves.append((k_row - 2, k_col - 1))

    if k_row - 2 in valid_range and k_col + 1 in valid_range:
        next_possible_moves.append((k_row - 2, k_col + 1))

    if k_row - 1 in valid_range and k_col + 2 in valid_range:
        next_possible_moves.append((k_row - 1, k_col + 2))

    if k_row + 1 in valid_range and k_col - 2 in valid_range:
        next_possible_moves.append((k_row + 1, k_col - 2))

    if k_row + 2 in valid_range and k_col - 1 in valid_range:
        next_possible_moves.append((k_row + 2, k_col - 1))

    if k_row + 2 in valid_range and k_col + 1 in valid_range:
        next_possible_moves.append((k_row + 2, k_col + 1))

    if k_row + 1 in valid_range and k_col + 2 in valid_range:
        next_possible_moves.append((k_row + 1, k_col + 2))

    return next_possible_moves


rows = int(input())

knights_coordinates = []
removed_knights = 0
max_knight = {}

matrix = []
for row in range(rows):
    current_row = list(input())
    matrix.append(current_row)
    for col in range(len(current_row)):
        if matrix[row][col] == "K":
            knights_coordinates.append((row, col))

while True:
    max_knight = {}
    max_knight_hits = 0
    max_knight_row, max_knight_col = None, None

    for knight_row, knight_col in knights_coordinates:
        hit_knights = 0

        next_possible_move = next_moves(knight_row, knight_col, rows)
        for next_row, next_col in next_possible_move:
            if matrix[next_row][next_col] == "K":
                hit_knights += 1
        if hit_knights:
            max_knight[(knight_row, knight_col)] = hit_knights
            if hit_knights > max_knight_hits:
                max_knight_hits = hit_knights
                max_knight_row, max_knight_col = knight_row, knight_col
    if max_knight:
        knights_coordinates.remove((max_knight_row, max_knight_col))
        removed_knights += 1
        matrix[max_knight_row][max_knight_col] = "0"
    else:
        break

print(removed_knights)