import java.util.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int h = sc.nextInt();
        int w = sc.nextInt();
        char[][] field = new char[h][];
        long[][] counts = new long[h + 1][w + 1];
        Arrays.fill(counts[0], Long.MAX_VALUE / 10);
        for (int i = 0; i < h; i++) {
            field[i] = sc.next().toCharArray();
            counts[i + 1][0] = Long.MAX_VALUE / 10;
        }
        counts[0][1] = -1;
        counts[1][0] = -1;
        for (int i = 1; i <= h; i++) {
            for (int j = 1; j <= w; j++) {
                counts[i][j] = Math.min(counts[i - 1][j], counts[i][j - 1]) + 1;
                if (field[i - 1][j - 1] == 'k') {
                    counts[i][j] += i - 1 + j - 1;
                }
            }
        }
        System.out.println(counts[h][w]);
    }
}