#include<bits/stdc++.h>
using namespace std;
int n,m,sum;
char a[35][35];
int fx[8]={0,1,0,-1,-1,-1,1,1},fy[8]={1,0,-1,0,-1,1,-1,1};
void dfs(int x,int y){
     a[x][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'){
            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'){
                sum++;
                a[i][j]='.';
                dfs(i,j);
            }}}
    cout<<sum;
    return 0;
}
/**************************************************************
	Problem: 1435
	User: panyuchen
	Language: C++
	Result: Time Limit Exceed
****************************************************************/