import sys

sys.setrecursionlimit(10 ** 6)
from bisect import *
from collections import *
from heapq import *

int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def MI1(): return map(int1, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
dij = [(0, 1), (1, 0), (0, -1), (-1, 0)]

def main():
    h,w=MI()
    inf=10**6
    t=[[c=="k" for c in input()] for _ in range(h)]
    dist=[[0]*w for _ in range(h)]
    for i in range(h):
        disti=dist[i]
        for j in range(w):
            if (i,j)==(0,0):continue
            d=inf
            if i-1>=0:d=min(d,disti1[j]+1)
            if j-1>=0:d=min(d,disti[j-1]+1)
            if t[i][j]:d+=i+j
            dist[i][j]=d
        disti1=disti
    #p2D(dist)
    print(dist[-1][-1])

main()