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

const vector<int> dx = {1, 0};
const vector<int> dy = {0, 1};

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

    vector<vector<vector<int>>> dp(H, vector<vector<int>>(W, vector<int>(H + W + 1, 0)));
    dp[0][0][1] = 1;

    for (int x = 0; x < H; x++) {
        for (int y = 0; y < W; y++) {
            for (int i = 0; i <= H + W; i++) {
                for (int j = 0; j < 2; j++) {
                    int nx = x + dx[j];
                    int ny = y + dy[j];
                    if (nx >= H || ny >= W) {
                        continue;
                    }
                    if (S[nx][ny] == '#') {
                        continue;
                    }
                    int ni = S[nx][ny] == 'o' ? 1 : -1;
                    if (i + ni < 0) {
                        continue;
                    }
                    dp[nx][ny][i + ni] += dp[x][y][i];
                }
            }
        }
    }

    int ans = 0;
    for (int i = 0; i <= H + W; i++) {
        ans += dp[H - 1][W - 1][i];
    }

    cout << ans << endl;
}