#include <bits/stdc++.h>
using namespace std;

int main() {
    int h, w;
    cin >> h >> w;
    vector<vector<char>> a(h, vector<char>(w));
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
            cin >> a[i][j];
        }
    }
    vector<char> v;
    for (int i = 0; i < h - 1; i++) {
        v.push_back('D');
    }
    for (int i = 0; i < w - 1; i++) {
        v.push_back('R');
    }
    int ans = 0;
    do {
        int i = 0, j = 0, now = 1;
        bool ok = true;
        for (char c : v) {
            if (c == 'D') {
                i++;
                if (a[i][j] == 'o') {
                    now++;
                } else if (a[i][j] == 'x') {
                    if (now == 0) {
                        ok = false;
                    }
                    now--;
                } else {
                    ok = false;
                }
            } else {
                j++;
                if (a[i][j] == 'o') {
                    now++;
                } else if (a[i][j] == 'x') {
                    if (now == 0) {
                        ok = false;
                    }
                    now--;
                } else {
                    ok = false;
                }
            }
        }
        if (ok) {
            ans++;
        }
    } while (next_permutation(v.begin(), v.end()));
    cout << ans << endl;
}