#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> P;
#define INF 1000000

int H, W;
char a[2100][2100];
int dist[2100][2100];

void dijkstra() {
    for (int i=0; i<H; i++) for (int j=0; j<W; j++) dist[i][j] = INF;
    dist[0][0] = 0;
    priority_queue<P, vector<P>, greater<P>> pq;
    pq.push(P(0, 0));
    
    while (pq.size()) {
        P p = pq.top(); pq.pop();
        int d = p.first;
        int v = p.second;
        int x = v/W, y = v%W;
        
        if (dist[x][y]<d) continue;
        if (x<H-1) {
            int w;
            if (a[x+1][y]=='k') w = x+y+2;
            else w = 1;
            
            if (dist[x+1][y]>dist[x][y]+w) {
                dist[x+1][y] = dist[x][y]+w;
                pq.push(P(dist[x+1][y], W*(x+1)+y));
            }
        }
        if (y<W-1) {
            int w;
            if (a[x][y+1]=='k') w = x+y+2;
            else w = 1;
            
            if (dist[x][y+1]>dist[x][y]+w) {
                dist[x][y+1] = dist[x][y]+w;
                pq.push(P(dist[x][y+1], W*x+y+1));
            }
        }
    }
}

int main() {
    cin >> H >> W;
    for (int i=0; i<H; i++) for (int j=0; j<W; j++) cin >> a[i][j];
    dijkstra();
    cout << dist[H-1][W-1] << endl;
}