#include<bits/stdc++.h>
using namespace std;
int fx[8]={-1,1,0,0,1,-1,-1,1};
int fy[8]={0,0,1,-1,1,-1,1,-1};
int n,m,s;
char a[101][101];
int dfs(int x,int y){
	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'){
				s++;
				dfs(i,j);
			}
		}
	}
	cout<<s;
	return 0;
}
/**************************************************************
	Problem: 1435
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2084 kb
****************************************************************/