#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef pair<int,P> P1;
typedef pair<P,P> P2;
#define pu push
#define pb push_back
#define mp make_pair
#define eps 1e-7
#define INF 1000000000
#define mod 1000000007
#define fi first
#define sc second
#define rep(i,x) for(int i=0;i<x;i++)
#define repn(i,x) for(int i=1;i<=x;i++)
#define SORT(x) sort(x.begin(),x.end())
#define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end())
#define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin())
#define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin())
int n,m;
ll dp[2005][2005];
char s[2005][2005];
int main(){
	scanf("%d%d",&n,&m);
	rep(i,n) scanf("%s",&s[i]);
	rep(i,n)rep(j,m) dp[i][j] = 1e18;
	dp[0][0] = 0;
	rep(i,n) rep(j,m){
		ll add = 0;
		if(s[i][j] == 'k') add = i+j;
		if(i) dp[i][j] = min(dp[i][j],dp[i-1][j]+add);
		if(j) dp[i][j] = min(dp[i][j],dp[i][j-1]+add);
	}
	cout << dp[n-1][m-1]+n+m-2 << endl;
}