import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] sa = br.readLine().split(" ");
		int n = Integer.parseInt(sa[0]);
		int m = Integer.parseInt(sa[1]);
		char[][] s = new char[n][m];
		for (int i = 0; i < n; i++) {
			s[i] = br.readLine().toCharArray();
		}
		br.close();

		int ans = 0;
		for (int i = 0; i < n; i++) {
			boolean flg = false;
			label:
			for (int j = 0; j < m; j++) {
				if (s[i][j] == 'o') {
					flg = true;
					for (int i2 = 0; i2 < n; i2++) {
						if (i2 != i && s[i2][j] == 'o') {
							flg = false;
							break label;
						}
					}
				}
			}
			if (flg) {
				ans++;
			}
		}
		System.out.println(ans);
	}
}