//no-unlocked
const int dx[] = {0, 1};
const int dy[] = {1, 0};
int H, W; 
char A[12][12]{};
ll ans = 0;
void dfs(int x, int y, int val) {
	if(A[x][y] == 'o') val += 1;
	else if(A[x][y] == 'x') val -= 1;
	if(x == H - 1 && y == W - 1 && val > 0) ans += 1, return;
	if(val >= 0) {
		rep(i, 2) {
			int nx = x + dx[i], ny = y + dy[i];
			if(nx >= 0 && nx < H && ny >= 0 && ny < W && A[nx][ny] != '#') dfs(nx, ny, val);
		}
	}
}

{
	rd(H, W, A(H)(W));
	dfs(0, 0, 0);
	wt(ans);
}