#include<bits/stdc++.h>
using namespace std;
int n;
int m;
int t;
char a[100][100];
int fx[4]={0,1,0,-1};
int fy[4]={1,0,-1,0};
void dfs(int x,int y){
     a[x][y]='.';
     for(int i=0;i<=3;i++){
     	int tx=x+fx[i];
     	int ty=y+fy[i];
     	if(tx>=1&&tx<=n&&ty>=1&&ty<=m&&a[tx][ty]=='W'){
     		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'){
    	    	t++;
    	    	dfs(i,j);
    	    }
        }
    }
    cout<<t<<endl;
	return 0;
}

/**************************************************************
	Problem: 1434
	User: zengdongxin
	Language: C++
	Result: Accepted
	Time:25 ms
	Memory:2084 kb
****************************************************************/