#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    int H, W, N, K, h=0, w=0, n, ans=0;
    bool f;
    cin >> H >> W;
    N = H+W-2;
    K = 1<<N;

    vector<string> s(H);
    for (int i=0; i<H; i++) cin >> s[i];

    for (int i=0; i<K; i++){
        if (__builtin_popcount(i) == H-1){
            h = 0; w = 0; n = 1; f = 1;
            for (int j=0; j<N; j++){
                if ((i>>j) & 1) h++;
                else w++;
                if (s[h][w] == '#'){
                    f = 0;
                    break;
                }
                else if (s[h][w] == 'o') n++;
                else n--;
                if (n < 0){
                    f = 0;
                    break;
                }
            }
            ans += f;
        }
    }
    cout << ans << endl;

    return 0;
}