#include <bits/stdc++.h>
using namespace std;
using i64 = long;


signed main() {

    int h, w;
    cin >> h >> w;
    vector<string> a(h);
    for (auto &x : a)
        cin >> x;

    vector<vector<int>> dp(h, vector<int>(w, 1e9));

    for(int i = 0; i < h; ++i)
        for(int j = 0; j < w; ++j){
            if(i == 0 && j == 0){
                dp[i][j] = 0;
                continue;
            }

            int res = 1e9;
            if(i)
                res = min(res, dp[i - 1][j] + 1);
            if(j)
                res = min(res, dp[i][j - 1] + 1);
            if(a[i][j] == 'k')
                res += i + j;
            dp[i][j] = res;
        }
    cout << dp.back().back() << endl;
}