# include <iostream>
# include <fstream>
# include <cstring>
using namespace std;
int n, m;
char map[1001][1001];
int is[1001][1001];
int dir[8][2] = { {-1,0},{1, 0},{0, 1},{0, -1},{1, 1},{1, -1},{-1, 1},{-1, -1}};

bool border(int i, int j)
{
    if(i >= 1 && i <= n && j <= m && j >= 1)
    return true;
    return false;
}
void bfs(int, int);

int main()
{
    //fstream cin("aaa.txt");
    while(cin >> n >> m)
    {
        if(n == 0 && m == 0)
        break;
        for(int i = 1; i <= n; i++)
            for(int j = 1; j <= m; j++)
                cin >> map[i][j];
        memset(is, 0, sizeof(is));
        int jishu = 0;
        for(int i = 1; i <= n; i++)
            for(int j = 1; j <= m; j++)
            {
                if(map[i][j] == ‘@‘ && is[i][j] == 0)
                {
                    is[i][j] = 1;
                    jishu++;
                    bfs(i, j);
                }
            }
        cout << jishu << endl;
    }
    return 0;
}

void bfs(int a, int b)
{
    int x, y;
    for(int i = 0; i < 8; i++)
    {
        x = a + dir[i][0];
        y = b + dir[i][1];
        if(border(x, y) && map[x][y] == ‘@‘ && is[x][y] == 0)
        {
            is[x][y] = 1;
            bfs(x, y);
        }
    }
}