#include<iostream>
#include<cstdio>
using namespace std;
int fxx[9]={0,-1,-1,-1,0,0,1,1,1};
int fxy[9]={0,-1,0,1,-1,1,-1,0,1};
int n,m,ans;
char a[105][105];
void dfs(int x,int y)
{
    int r,c;
    a[x][y]='W';
    for (int i=1;i<=8;i++)
    {
        r=x+fxx[i];
        c=y+fxy[i];
        if (r>=1&&r<=n&&c>=1&&c<=m&&a[r][c]=='W')
            dfs(r,c);
    }
}
int main()
{
    scanf("%d %d\n",&n,&m);
    for (int i=1;i<=n;i++)
    {
        for (int j=1;j<=m;j++)
            cin>>a[i][j];
    }
    ans=0;
    for (int i=1;i<=n;i++)
    {
        for (int j=1;j<=m;j++)
        {
            if (a[i][j]=='W')
            {
                ans++;
                dfs(i,j);
            }
        }
    }
    printf("%d\n",ans);
    return 0;
}