#pragma comment (linker, "/STACK:256000000")
#define  _CRT_SECURE_NO_WARNINGS
#include "bits/stdc++.h"

using namespace std;
typedef string::const_iterator State;
#define eps 1e-11L
#define MAX_MOD 1000000007LL
#define GYAKU 500000004LL

#define MOD 998244353LL
#define seg_size 262144
#define pb push_back
#define mp make_pair
typedef long long ll;
#define REP(a,b) for(long long (a) = 0;(a) < (b);++(a))
#define ALL(x) (x).begin(),(x).end()
void init() {
	iostream::sync_with_stdio(false);
	cout << fixed << setprecision(100);
}
#define int ll
int dist[3000][3000];
void solve() {
	int h, w;
	cin >> h >> w;
	REP(i, h) {
		REP(q, w) {
			dist[i][q] = 1e18;
		}
	}
	dist[0][0] = 0;
	REP(i, h) {
		string s;
		cin >> s;
		REP(q, s.length()) {
			int cost = 1;
			if (s[q] == 'k') {
				cost += llabs(i + q);
			}
			if (i != 0) {
				dist[i][q] = min(dist[i - 1][q] + cost, dist[i][q]);
			}
			if (q != 0) {
				dist[i][q] = min(dist[i][q - 1] + cost, dist[i][q]);
			}
		}
	}
	cout << dist[h - 1][w - 1] << endl;
}

#undef int

int main() {
	init();
	solve();
}