#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines


# %%
H, W = map(int, readline().split())
A = [list(readline().rstrip()) for _ in range(H)]

# %%
dp = [[10 ** 9] * W for _ in range(H)]
dp[0][0] = 0
for h in range(H):
    for w in range(W):
        if h > 0:
            x = dp[h - 1][w] + 1
            if dp[h][w] > x:
                dp[h][w] = x
        if w > 0:
            x = dp[h][w - 1] + 1
            if dp[h][w] > x:
                dp[h][w] = x
        if A[h][w] == ord('k'):
            dp[h][w] += (h + w)

# %%
print(dp[-1][-1])