#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
  int h, w;
  cin >> h >> w;
  char a[h][w];
  for (int i = 0; i < h; i++) {
    for (int j = 0; j < w; j++) {
      cin >> a[i][j];
    }
  }
  int ans = 0;
  for (int i = 0; i < 1 << (h + w - 2); i++) {
    int x = 0, y = 0;
    int p = 1;
    for (int j = 0; j < h + w - 2; j++) {
      if (i & (1 << j)) {
        x++;
      } else {
        y++;
      }
      if (x >= h || y >= w) {
        p = -999;
        break;
      }
      if (a[x][y] == '#') {
        p = -999;
        break;
    
      }
      if (a[x][y] == 'o') {
        p++;
      }
      if (a[x][y] == 'x') {
        p--;
        if (p == -1) {
          p = -999;
          break;
        }
      }
    }
    if (p >= 0) {
      ans++;
    }
  }
  cout << ans << endl;
  return 0;
}