#include <bits/stdc++.h>
using namespace std;
#define ll long long
int n,m;
char a[6][6];
bool used[6][6];
int ans;
void dfs(int x,int y)
{
    if(a[x][y]=='*')
    {
        ans++;
    }
    if(x==n&&y==m)
    {
        cout << ans;
        exit(0);
    }
    if(x+1<=n&&a[x+1][y]=='*')
    {
        dfs(x+1,y);
    }
    if(y+1<=m&&a[x][y+1]=='*')
    {
        dfs(x,y+1);
    }
    if(y+1<=m)
    {
        dfs(x,y+1);
    }
    if(x+1<=n)
    {
        dfs(x+1,y);
    }
}
int main()
{
    cin >> n >> m;
    for(int i = 1;i<=n;i++)
    {
        for(int j = 1;j<=m;j++)
        {
            cin >> a[i][j];
        }
    }
    dfs(1,1);
}
 