#==================================================
H,W=map(int,input().split())

A=[]
for _ in range(H):
    A.append(list(map(lambda x:1 if x=="k" else 0,input()))+[-1])
A.append([-1]*(W+1))

inf=float("inf")
DP=[[inf]*W for _ in range(H)]; DP[0][0]=0

for i in range(H):
    for j in range(W):
        if i!=H-1:
            if A[i+1][j]==0:
                DP[i+1][j]=min(DP[i+1][j],DP[i][j]+1)
            else:
                DP[i+1][j]=min(DP[i+1][j],DP[i][j]+1+((i+1)+j))

        if j!=W-1:
            if A[i][j+1]==0:
                DP[i][j+1]=min(DP[i][j+1],DP[i][j]+1)
            else:
                DP[i][j+1]=min(DP[i][j+1],DP[i][j]+1+(i+(j+1)))

print(DP[-1][-1])