> #include <iostream>
> using namespace std;
> 
> char D[82][1002];
> bool Fir[82][1002];
> int Rst[80002];
> int W,H,N;
> 
> void work(int i, int j)
> {
> 	Fir[i][j] =true;
> 	Rst[N]++;
> 	if(i>0)                 //ok
> 	{
>         if(D[i-1][j] == '*'&& !Fir[i-1][j] )
> 		{
> 		
> 			work(i-1,j);
> 		}
> 	}
> 	if(i< (H-1))             //ok
> 	{
>         if(D[i+1][j] == '*'&& !Fir[i+1][j] )
> 		{
> 	       work(i+1,j);
> 		}
> 	}
> 	if(j>0)                  //ok
> 	{
> 		 if(D[i][j-1] == '*'&& !Fir[i][j-1] )
> 		{
> 	       work(i,j-1);
> 		}
> 	}
> 	if(j<(W-1))              //ok
> 	{
> 		if(D[i][j+1] == '*'&& !Fir[i][j+1] )
> 		{
>             work(i,j+1);
> 		}
> 	}
> }
> void init()
> {
> 	for(int i=0;i<H;i++)
> 	{
> 		for(int j=0;j<W;j++)
> 			Fir[i][j] = false;
> 	}
> 	for(i=0;i<N*W;i++)
> 		Rst[i] = 0;
> 	N = 0;
> }	
> int main()
> {
> 	char c[1005];
> 	while(scanf("%d%d",&W,&H)!=EOF)
> 	{
> 	 gets(c);
>      int i,j;
> 	 for(i=0;i<H;i++)
> 	{   
> 		gets(c);
> 		for(j=0;j<W;j++)
> 			D[i][j]=c[j];
> 	}
> 	init();
>     for(i=0;i<H;i++)
> 	{
> 		for(j=0;j<W;j++)
> 		{
> 			if(D[i][j] == '*'&& !Fir[i][j] )
> 			{
> 			    work(i,j);	
> 				N++;
> 			}
> 		}
> 
> 	}
> 	int tmp=0;
> 	i=0;
> 	while(i<N)
> 	{
> 		if(Rst[i]>tmp)
> 			tmp = Rst[i];
> 		i++;
> 	}
> 	printf("%d\n",tmp);
> 	}
> 	return 0;
> }