H,W = map(int,input().split())
a = [input() for _ in range(H)]

C = 10 ** 8
dp = [[C] * W for _ in range(H)]
dp[0][0] = 0
for h in range(H):
    for w in range(W):
        if w < W - 1:
            if a[h][w+1] == 'k':
                count = 1 + h + w + 1
            else:
                count = 1
            dp[h][w+1] = min(dp[h][w+1],dp[h][w] + count)
        if h < H - 1:
            if a[h+1][w] == 'k':
                count = 1 + h + w + 1
            else:
                count = 1
            dp[h+1][w] = min(dp[h+1][w],dp[h][w] + count)
print(dp[H-1][W-1])