static void Main(string[] args)
{
string[] grid = Console.ReadLine().Split(' ');
int rows = int.Parse(grid[0]);
int colums = int.Parse(grid[1]);
bool max = rows > colums ? true : false;
int result = 0;
List<int> strawRows = new List<int>();
List<int> strawColums = new List<int>();
string[] g = new string[rows];
for (int i = 0; i < rows; i++)
{
g[i] = Console.ReadLine();
Regex r1 = new Regex("S");
foreach (Match m in r1.Matches(g[i]))
{
strawRows.Add(i);
strawColums.Add(m.Index);
}
}
if (max)
{
int r = 0;
for (int i = 0; i < g.Length; i++)
{
if (!strawRows.Contains(i))
{
result += colums;
r++;
}
}
for (int i = 0; i < g[0].Length; i++)
{
if (!strawColums.Contains(i))
result += (rows - r);
}
}
else
{
int c = 0;
for (int i = 0; i < g[0].Length; i++)
{
if (!strawColums.Contains(i))
{
result += rows;
c++;
}
}
for (int i = 0; i < g.Length; i++)
{
if (!strawRows.Contains(i))
result += (colums - c);
}
}
Console.WriteLine(result);
Console.ReadLine();
}
