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

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

DP=[[0]*W for _ in range(H)]; DP[0][0]=0
inf=1000*H*W

for i in range(H):
    a=A[i]
    D=DP[i]
    for j in range(W):
        if i==j==0:
            continue

        X=inf
        if i!=0:
            if a[j]==0:
                if X>DP[i-1][j]+1:
                    X=DP[i-1][j]+1
            else:
                if X>DP[i-1][j]+1+(i+j):
                    X=DP[i-1][j]+1+(i+j)

        if j!=0:
            if a[j]==0:
                if X>D[j-1]+1:
                    X=D[j-1]+1
            else:
                if X>D[j-1]+1+(i+j):
                    X=D[j-1]+1+(i+j)
        D[j]=X

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