#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define repr(i, n) for (int i = (n) - 1; i >= 0; i--)
#define range(a) a.begin(), a.end()

int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(15);
  int H, W; cin >> H >> W;
  vector<string> G(H); rep(i, H) cin >> G[i];
  vector<vector<int>> dp(H, vector<int>(W, INT_MAX));
  dp[0][0] = 0;
  rep(i, H) rep(j, W) {
    if (i - 1 >= 0) {
      dp[i][j] = min(dp[i][j], dp[i - 1][j] + 1);
    }
    if (j - 1 >= 0) {
      dp[i][j] = min(dp[i][j], dp[i][j - 1] + 1);
    }
    if (G[i][j] == 'k') {
      dp[i][j] += i + j;
    }
  }
  cout << dp[H - 1][W - 1] << endl;
}