> #include <stdio.h>
> #include <memory.h>
> char map[50][50];
> long value[60][60];
> long zg(long num1,long num2)
> {
> 	while(num1%num2!=0)
> 	{
> 		long k;
> 		k=num1%num2;
> 		num1=num2;
> 		num2=k;
> 	}
> 	return num2;
> }
> 
> int main()
> {
> 	int n,m,i,j;
> 	long sum,nn;
> 	char str[1000];
> 	scanf("%d %d",&n,&m);
> 	getchar();
> 	for(i=0;i<n;i++)
> 	{
> 		int p=0;
> 		j=0;
> 		gets(str);
> 		while(str[p])
> 		{
> 			if(str[p]=='*'||str[p]=='.')
> 			{
> 				map[i][j]=str[p];
> 				j++;
> 			}
> 			p++;
> 		}
> 
> 	}
> 	memset(value,0,sizeof(int)*60*60);
> 	value[0][0]=1;
> 	for(i=0;i<n;i++)
> 	{
> 		for(j=0;j<=i;j++)
> 		{
> 			if(value[i][j]==0)continue;
> 			if(i!=n&&map[i][j]=='.')value[i+2][j+1]+=value[i][j]*4;
> 			else
> 			{
> 				value[i+1][j]+=value[i][j];
> 				value[i+1][j+1]+=value[i][j];
> 			}
> 		}
> 	}
> 	sum=0;
> 	for(j=0;j<=n;j++)
> 	{
> 		sum+=value[n][j];
> 	}
> 	if(value[n][m]!=0)
> 	{
> 		nn=zg(sum,value[n][m]);
> 		printf("%ld/%ld\n",value[n][m]/nn,sum/nn);
> 	}
> 	else printf("0/1\n");
> 	return 0;
> }