#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;

const int MAXN = 110;
char map[MAXN][MAXN];
int dir[8][2]={  {-1, -1},{-1, 0},{-1, 1},{0, 1},{1, 1},{1, 0},{1, -1},{0, -1} };
int n,m;

void dfs(int x,int y)
{
	map[x][y] = '*';
	for (int i = 0 ; i < 8 ; i++)
	{
		int nx = x + dir[i][0];
		int ny = y + dir[i][1];

		if ( nx < 1 || nx > n || ny < 1 || ny > m )
			continue ;
		if (map[nx][ny] == '*' )
			continue ;
		dfs(nx,ny);
	}
}

int main()
{
	while (scanf("%d%d",&n,&m) != EOF )
	{
		if(m == 0 && n == 0 )
			break;
		getchar();
		for (int i = 1 ; i <= n ; i++)
				scanf("%s",map[i]+1);   //起初挨個字元讀，忘了會把行末的回車讀到,還有我們是從第一列開始讀的，所以+1
		
		int count = 0 ;
		for (int i = 1 ; i <= n ; i++)
			for (int j = 1 ; j <= m ; j++)
			{
				if (map[i][j] == '@')
				{
					dfs(i,j);
					count++;
				}
			}
		printf("%d\n",count);
	}
	return 0;
}