#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define ls (p << 1)
#define rs (ls | 1)
#define tm ((tl + tr) >> 1)
#define lowbit(x) ((x) & -(x))

using namespace std;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;

constexpr double eps = 1e-8;
constexpr int NINF = 0xc0c0c0c0;
constexpr int INF = 0x3f3f3f3f;
constexpr ll LNINF = 0xc0c0c0c0c0c0c0c0;
constexpr ll LINF = 0x3f3f3f3f3f3f3f3f;
constexpr ll mod = 1e9 + 7;
constexpr ll N = 15 + 5;

int n, m, x, y;
vector<string> s;
bool vis[N][N];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    cin >> n >> m;
    s.resize(n);
    for (int i = 0; i < n; i++) cin >> s[i];
    int ans = 0;
    while (!(x == n - 1 && y == m - 1)) {
        int u, v, w = INF;
        bool ok = false;
        for (int i = x; i < n; i++) {
            for (int j = y; j < m; j++) {
                if (s[i][j] == '*' && !vis[i][j] && i - x + j - y < w) {
                    vis[i][j] = true;
                    ok = true;
                    u = i;
                    v = j;
                    w = i - x + j - y;
                }
            }
        }
        x = u;
        y = v;
        // cout << "x = " << x << " y = " << y << '\n';
        // cout << "u = " << x << " v = " << y << '\n';
        if (!ok) break;
        else {
            x = u;
            y = v;
            ans++;
        } 
    }
    cout << ans << '\n';

    return 0;
}