#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using VVVL = vector<VVL>;
using VD = vector<double>;
using VVD = vector<VD>;
using VS = vector<string>;
using P = pair<ll,ll>;
using VP = vector<P>;
#define rep(i, n) for (ll i = 0; i < ll(n); i++)
#define out(x) cout << x << endl
#define dout(x) cout << fixed << setprecision(10) << x << endl
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define sz(x) (int)(x.size())
#define re0 return 0
#define pcnt __builtin_popcountll
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
constexpr int inf = 1e9;
constexpr ll INF = 1e18;
//using mint = modint1000000007;
using mint = modint998244353;
int di[4] = {1,0,-1,0};
int dj[4] = {0,1,0,-1};

int main(){
    ll h,w;
    cin >> h >> w;
    VS a(h);
    rep(i,h) cin >> a[i];
    ll sum = h+w-2;
    ll sum2 = 1LL<<sum;
    ll ans = 0;
    rep(bit,sum2){
        ll i = 0,j = 0,cnt = 1;
        bool ok = true;
        rep(v,h+w-2){
            if(bit>>v&1){
                i++;
            } else {
                j++;
            }
            if(i < 0 || j < 0 || i >= h || j >= w){
                ok = false;
                break;
            }
            if(a[i][j] == '#'){
                ok = false;
                break;
            }
            if(a[i][j] == 'o'){
                cnt++;
            } else {
                cnt--;
            }
            if(cnt < 0){
                ok = false;
                break;
            }
        }
        //cout << ok << ' ' << bitset<4>(bit) << ' ' << i << ' ' << j << endl;
        if(ok) ans++;
    }
    out(ans);
}