#include <bits/stdc++.h>
#ifdef LOCAL
#include "./debug.cpp"
#else
#define debug(...)
#define print_line
#endif
using namespace std;
using ll = long long;

int main() {
    int H, W;
    cin >> H >> W;
    vector<string> S(H);
    for (int i = 0; i < H; i++) {
        cin >> S[i];
    }

    vector<int> T(H + W - 2, 0);
    for (int i = H - 1; i < H + W - 2; i++) {
        T[i] = 1;
    }

    int ans = 0;
    do {
        int cnt = 0, x = 0, y = 0;
        bool ok = true;
        for (int i = 0; i < H + W - 2; i++) {
            if (x >= H || y >= H || S[x][y] == '#') {
                ok = false;
                break;
            }
            if (S[x][y] == 'o') {
                cnt++;
            } else if (S[x][y] == 'x' && cnt > 0) {
                cnt--;
            } else {
                ok = false;
                break;
            }
            if (T[i] == 0) {
                x++;
            } else {
                y++;
            }
        }
        if (ok) {
            ans++;
        }
    } while (next_permutation(T.begin(), T.end()));

    cout << ans << endl;
}