import java.util.*;
import java.io.*;
public class Main {
    static int[][] vis;
    static char[][] map;
    static int N, M;
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        N = Integer.parseInt(st.nextToken());
        M = Integer.parseInt(st.nextToken());
        vis = new int[N][M];
        map = new char[N][M];
        for (int i = 0; i < N; i++) map[i] = br.readLine().toCharArray();
        int count = 1;
        int ans = 0;
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < M; j++) {
                if (vis[i][j] == 0) {
                    ans += f(i,j,count);
                    count++;
                }
            }
        }
        System.out.println(ans);
    }
    static int f(int row, int col, int count) {
        if (vis[row][col] > 0) {
            return (vis[row][col] == count ? 1 : 0);
        }
        vis[row][col] = count;
        if (map[row][col] == 'N') {
            return f(row - 1, col, count);
        } else if (map[row][col] == 'W') {
            return f(row, col - 1, count);
        } else if (map[row][col] == 'S') {
            return f(row + 1, col, count);
        } else {
            return f(row, col + 1, count);
        }
    }
}