#include <bits/stdc++.h>
using namespace std;
using lint = long long;
int main() {
  int h, w;
  cin >> h >> w;
  int n = h+w-2;
  vector<string> vec(h);
  for (int i = 0; i < h; i++) cin >> vec[i];
  int ans = 0;
  for (int i = 0; i < (1<<n); i++) {
    int now = 1;
    bool flag = true;
    int x = 0, y = 0;
    for (int j = 0; j < n; j++) {
      int a = (i&(1<<j));
      if (a != 0) x++;
      else y++;
      if (x >= h || y >= w) {
        flag = false;
        break;
      }
      if (vec[x][y] == 'o') now++;
      else if (vec[x][y] == 'x') {
        now--;
        if (now == -1) {
          flag = false;
          break;
        }
      }
      else if (vec[x][y] == '#') {
        flag = false;
        break;
      }
    }
    if (flag) ans++;
  }
  cout << ans << endl;
}