#include<bits/stdc++.h> 
using namespace std;
int fx[8]={0,1,1,1,0,-1,-1,-1};
int fy[8]={1,1,0,-1,-1,-1,0,1};
int n,m,ans;
char a[105][105];
void dfs(int x,int y){//Ìî³ä  
    for(int i=0;i<=7;i++){
        int tx=x+fx[i];
        int ty=y+fy[i];
        if(tx>=1&&tx<=n&&ty>=1&&ty<=m&&a[tx][ty]=='W'){
            a[tx][ty]='.';
            dfs(tx,ty);
        }
    }
} 
int main(){
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++) {
            cin>>a[i][j];
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++) {
            if(a[i][j]=='W'){
                ans++;
                a[i][j]='.';
                dfs(i,j);
            }
        }
    }
    cout<<ans;
     
}
/**************************************************************
	Problem: 1435
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:22 ms
	Memory:2084 kb
****************************************************************/