#include<iostream>
#include <algorithm>
#include<string>
#include <bitset>
#include <vector>
#include <functional>
#include <climits>
#include <iomanip>
using namespace std;
int main()
{

	//int a = 0, b = 0, c = 0, d = 0, e = 0, f = 0, g = 0, h = 0, ans = 0;
	long long a = 0, b = 0, c = 0, d = 0, e = 0, f = 0, g = 0, h = 0, i = 0, j = 0, k = 0, l = 0, ans = 0;
	//cout << LONG_MAX << endl;
	//string s[1001];
	//long long n, A[1000000000];
	long long n, m;
	string s;
	
	cin >> n;
	cin >> m ;
	for ( a = 0; a < n; a++)
	{
			cin >> s;
		for ( b = 0; b < m; b++)
		{

			if (s[b]=='W')
			{
				d++;
			}
		}
	}
	//std::cout << std::fixed;
	//cout << std::setprecision(20) << << endl;
	cout << d << endl;
	
	return 0;
}