#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#ifdef LOCAL
#include <algo/debug.h>
#else
#define debug(...) void(0)
#endif
#include<atcoder/all>
using namespace atcoder;
using mint = modint998244353;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int H, W; cin >> H >> W;
    vector<string> A(H); for(int i = 0; i < H; i++) cin >> A[i];
    int ans = 0;
    for(int bit = 0; bit < (1 << H + W - 2); bit++) {
        if(__builtin_popcount(bit) != H - 1) continue;
        int now = 1, ii = 0, jj = 0;
        bool f = 1;
        for(int i = 0; i < H + W - 2; i++) {
            if(bit & (1 << i)) ii++;
            else jj++;
            if(A[ii][jj] == 'o') {
                now++;
            }else if(A[ii][jj] == '#') {
                f = 0; break;
            }else {
                if(now == 0) {
                    f = 0; break;
                }else {
                    now--;
                }
            }
        }
        ans += f;
    }
    cout << ans << endl;
}