INF = 10 ** 7
import sys
input = sys.stdin.readline
sys.setrecursionlimit(100000000)
dy = (-1,0,1,0)
dx = (0,1,0,-1)
from collections import deque

def main():
    h,w = map(int,input().split())
    grid = [list(input()) for _ in range(h)]

    dist = [[INF] * (w + 1) for _ in range(h + 1)]
    dist[0][1] = -1
    for i in range(h):
        for j in range(w):
            if grid[i][j] == 'k':
                dist[i + 1][j + 1] = min(dist[i][j + 1],dist[i + 1][j]) + i + j + 1
            else:
                dist[i + 1][j + 1] = min(dist[i][j + 1],dist[i + 1][j]) + 1

    print(dist[-1][-1])

if __name__ == '__main__':
    main()