#include<iostream>
#include<cstring>
using namespace std;
int n,m,ans,vis[1010][1010];char a[1010][1010];
int dfs(int x,int y){
	if(x<1||x>n||y<1||y>m||vis[x][y])return 0;
	vis[x][y]=1;
	if(a[x][y]=='u')dfs(x-1,y);
	else if(a[x][y]=='d')dfs(x+1,y);
	else if(a[x][y]=='l')dfs(x,y-1);
	else if(a[x][y]=='r')dfs(x,y+1);
	else return 1;
}
int main(){
	scanf("%d%d",&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++)
			memset(vis,0,sizeof(vis)),ans+=dfs(i,j);
	printf("%d",ans);return 0;
}