import java.lang.Exception
import kotlin.math.max
import kotlin.math.min

val MOD = 1_000_000_007

fun main() {
  val (H, W) = readInts()
  val g = Array(H){readLn()}
  val C = Array(H){IntArray(W){1} }
  for (h in 0 until H) {
    for (w in 0 until W) {
      if (g[h][w] == 'k') C[h][w] += h + w
    }
  }
  val inf = 1e18.toLong()
  val dp = Array(H){LongArray(W){inf} }
  dp[0][0] = 0
  for (h in 0 until H) {
    for (w in 0 until W) {
      if (h - 1 >= 0) dp[h][w] = min(dp[h][w], dp[h-1][w] + C[h][w])
      if (w - 1 >= 0) dp[h][w] = min(dp[h][w], dp[h][w-1] + C[h][w])
    }
  }
  println(dp[H-1][W-1])
}












































private val isDebug = try {
  // なんか本番でエラーでる
  System.getenv("MY_DEBUG") != null
} catch (t: Throwable) {
  false
}

private fun readLn() = readLine()!!
private fun readStrings() = readLn().split(" ")
private fun readInts() = readStrings().map { it.toInt() }.toIntArray()
private fun readLongs() = readStrings().map { it.toLong() }.toLongArray()
private inline fun debug(msg: () -> String) {
  if (isDebug) System.err.println(msg())
}
private fun debug(a: LongArray) {
  debug{a.joinToString(" ")}
}
private fun debug(a: IntArray) {
  debug{a.joinToString(" ")}
}
private fun debug(a: BooleanArray) {
  debug{a.map{if(it) 1 else 0}.joinToString("")}
}
private fun debugDim(A: Array<IntArray>) {
  if (isDebug) {
    for (a in A) {
      debug(a)
    }
  }
}