#include<stdio.h>
 
int main(void){
	int i,j,r=0,n,m;
	char s[64];
	scanf("%d%d",&n,&m);
	for(i = 0;i < n;i++){
		scanf("%s",s);
		for(j = 0;j < m;j++){if(s[j] == 'W'){r++;}}
	}
	printf("%d\n",r);
	return 0;
}