#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
signed main(){
  Int h,w;
  cin>>h>>w;
  vector<string> st(h);
  for(Int i=0;i<h;i++) cin>>st[i];

  const Int INF = 1e15;
  vector< vector<Int> > dp(h,vector<Int>(w,INF));

  dp[0][0]=0;
  for(Int i=0;i<h;i++){
    for(Int j=0;j<w;j++){
      if(i+1<h){
        Int cst=1;
        if(st[i+1][j]=='k') cst+=i+j+1;
        chmin(dp[i+1][j],dp[i][j]+cst);
      }
      if(j+1<w){
        Int cst=1;
        if(st[i][j+1]=='k') cst+=i+j+1;
        chmin(dp[i][j+1],dp[i][j]+cst);
      }
    }
  }

  cout<<dp[h-1][w-1]<<endl;
  return 0;
}