#include<bits/stdc++.h>
using namespace std;
char f[9182369][123137];
int sf;
int ss(int ff,int mm){
	f[ff][mm]='.';
	if(f[ff+1][mm]=='w') sf=0;
	else if(f[ff+1][mm+1]=='w') sf=0;
	else if(f[ff+1][mm-1]=='w') sf=0;
	else if(f[ff-1][mm+1]=='w') sf=0;
	else if(f[ff-1][mm]=='w') sf=0;
	else if(f[ff-1][mm-1]=='w') sf=0;
	else if(f[ff][mm-1]=='w') sf=0;
    else if(f[ff][mm+1]=='w') sf=0;
    else sf=1;
}
int main(){
	int n,m,s=0;
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			cin>>f[i][j];
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			if(f[i][j]=='w'){
				ss(i,j);
				if(sf==1) s++; 		
			}
		}
	}
	cout<<s;
}