/* -*- coding: utf-8 -*-
 *
 * 971.cc:  No.971 いたずらっ子 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_H = 2000;
const int MAX_W = 2000;
const int INF = 1 << 30;

/* typedef */

/* global variables */

char fs[MAX_H][MAX_W + 4];
int ds[MAX_H][MAX_W];

/* subroutines */

inline void setmin(int &a, int b) { if (a > b) a = b; }

/* main */

int main() {
  int h, w;
  scanf("%d%d", &h, &w);

  for (int y = 0; y < h; y++) {
    scanf("%s", fs[y]);
    fill(ds[y], ds[y] + w, INF);
  }
  ds[0][0] = 0;

  for (int y = 0; y < h; y++)
    for (int x = 0; x < w; x++) {
      int vd = ds[y][x] + 1;
      if (fs[y][x] == 'k') vd += y + x;

      if (y + 1 < h) setmin(ds[y + 1][x], vd);
      if (x + 1 < w) setmin(ds[y][x + 1], vd);
    }

  printf("%d\n", ds[h - 1][w - 1]);
  return 0;
}