#include <bits/stdc++.h>
#include <atcoder/all>
#define rep(i,a,n) for(ll i = a; i < n; i++)
#define yes (cout << "Yes" << endl)
#define YES (cout << "YES" << endl)
#define no (cout << "No" << endl)
#define NO (cout << "NO" << endl)
#define pb push_back
#define pf push_front
#define mp make_pair
#define fi first
#define se second
#define all(a)  (a).begin(),(a).end()
using namespace std;
using namespace atcoder;
using ll = long long;
using ull = unsigned long long;
using vi = vector<int>;
using vd = vector<double>;
using vs = vector<string>;
using vl = vector<long long>;
using vvi = vector<vector<int>>;
using Graph = vector<vector<int>>;
const int mod = 998244353;
const int MOD = 1000000007;
const int dx[4] = {-1,0,1,0};
const int dy[4] = {0,1,0,-1};
ll chmin(ll a,ll b) {
    if(a < b) return a;
    else return b;
}
void O(vector<int> v) {
    rep(i,0,v.size()) {
        cout << v[i] << " ";
    }
    cout << endl;
}
void O(vector<string> v) {
    rep(i,0,v.size()) cout << v[i] << endl;
    cout << endl;
}
void O(int a) {
    cout << a << endl;
}
void O(ll a) {
    cout << a << endl;
}
void O(string s) {
    cout << s << endl;
}
struct unionfind {
  vector<int> data;
  unionfind(int size) : data(size, -1) { }
  bool unite(int x, int y) {
    x = root(x); y = root(y);
    if (x != y) {
      if (data[y] < data[x]) swap(x, y);
      data[x] += data[y]; data[y] = x;
    }
    return x != y;
  }
  bool same(int x, int y) {
    return root(x) == root(y);
  }
  int root(int x) {
    return data[x] < 0 ? x : data[x] = root(data[x]);
  }
  int size(int x) {
    return -data[root(x)];
  }
};
ll gcd(ll a, ll b) {
	a = abs(a); b = abs(b);
	if (a < b)swap(a, b);
	while (b) {
		ll r = a % b; a = b; b = r;
	}
	return a;
}
//x,yがax+by=gcd(a,b)の解になる x,yが格納
ll extgcd(ll a, ll b, ll& x, ll& y) {
	ll d = a;
	if (b != 0) {
		d = extgcd(b, a % b, y, x);
		y -= (a / b) * x;
	}
	else {
		x = 1; y = 0;
	}
	return d;
}
ll pow(ll a,ll b) {
    ll ans = 1;
    rep(i,0,b) ans *= a;
    return ans;
}

int main() {
    int h,w;
    cin >> h >> w;
    int a[h][w];
    rep(i,0,h) rep(j,0,w) {
        char c;
        cin >> c;
        if(c == 'o') {
            a[i][j] = 1;
        }
        else if(c == '#') a[i][j] = 0;
        else a[i][j] = -1;
    }
    int v[h + w - 2];
    rep(i,0,h - 1) v[i] = 3;
    rep(i,0,w - 1) v[i + h - 1] = 4;
    /*rep(i,0,h + w - 2) cout << v[i] << " ";
    cout << endl;
    */
    ll ans = 0;
    do{
        int cnt = 1;
        int nowx = 0;
        int nowy = 0;
        bool ok = true;
        rep(i,0,h + w - 2) {
            if(v[i] == 3) {
                nowx++;
            }
            else nowy++;
            //cout << nowx << " " << nowy << endl;
            cnt += a[nowx][nowy];
            if(cnt <= -1) {
            
                ok = false;
            }
            if(a[nowx][nowy] == 0) {
            
                ok = false;
            }
            
        }
        //cout << endl;
        if(ok) ans++;
    }while(next_permutation(v,v + h + w - 2));
    cout << ans << endl;
}