#include<bits/stdc++.h>
using namespace std;
int n,m,k=0,l,fx[8]={0,0,-1,1,1,-1,1,-1},fy[8]={1,-1,0,0,1,-1,-1,1},ans1,ans2=0,ans3=0,ans=0;
char a[101][101];
void asd(int x,int y){
	
	for(int i=0;i<8;i++){
	
		int tx=x+fx[i];
		int ty=y+fy[i];
		if(tx>0&&ty>0&&tx<=n&&ty<=m&&a[tx][ty]=='W'){
			a[tx][ty]='q';	
			asd(tx,ty);
			
			
			
		}
	}
	ans++;
	return;
}
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'){
				ans1++;
				asd(i,j);	
			}
		}
	}
	cout<<ans1;
}
/**************************************************************
	Problem: 1435
	User: zhengzihao
	Language: C++
	Result: Accepted
	Time:21 ms
	Memory:2084 kb
****************************************************************/