#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<ll>>;
ll mod=1e9+7;

int main() {
    ll H,W;
    cin>>H>>W;
    vector<vector<bool>> C(H+1,vector<bool> (W+1,false));
    rep(h,H){
        string S;
        cin>>S;
        rep(w,W){
            if(S[w]=='k')C[h][w]=true;
        }
    }
    vector<vll> DP(H+1,vll(W+1,1e18));
    DP[0][0]=0;
    rep(h,H){
        rep(w,W){
            if(C[h][w+1])DP[h][w+1]=min(DP[h][w+1],DP[h][w]+2+h+w);
            else DP[h][w+1]=min(DP[h][w+1],DP[h][w]+1);

            if(C[h+1][w])DP[h+1][w]=min(DP[h+1][w],DP[h][w]+2+h+w);
            else DP[h+1][w]=min(DP[h+1][w],DP[h][w]+1);
        }
    }
    cout<<DP[H-1][W-1]<<endl;
}