#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
template <typename T> using posteriority_queue = priority_queue<T, vector<T>, greater<T> >;
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3fLL;
const double EPS = 1e-8;
const int MOD = 1000000007;
// const int MOD = 998244353;
const int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1};
// const int dy[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx[] = {0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; }
template <typename T> void unique(vector<T> &a) { a.erase(unique(ALL(a)), a.end()); }
struct IOSetup {
  IOSetup() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);
  }
} iosetup;

int main() {
  int h, w; cin >> h >> w;
  vector<string> a(h); REP(i, h) cin >> a[i];
  vector<vector<ll> > dist(h, vector<ll>(w, LINF));
  dist[0][0] = 0;
  posteriority_queue<pair<ll, pair<int, int> > > que;
  que.emplace(0, make_pair(0, 0));
  while (!que.empty()) {
    ll cost = que.top().first;
    int i, j; tie(i, j) = que.top().second;
    que.pop();
    if (cost > dist[i][j]) continue;
    REP(k, 4) {
      int y = i + dy[k], x = j + dx[k];
      if (0 <= y && y < h && 0 <= x && x < w) {
        ll nx = dist[i][j] + 1 + (a[y][x] == 'k' ? y + x : 0);
        if (nx < dist[y][x]) {
          dist[y][x] = nx;
          que.emplace(nx, make_pair(y, x));
        }
      }
    }
  }
  cout << dist[h - 1][w - 1] << '\n';
  return 0;
}