func main()
	var H: int :: cui@inputInt()
	var W: int :: cui@inputInt()
	var m: [][]char :: #[H, W]char
	var mp: [][]int :: #[H, W]int
	for h(0, H - 1)
		do m[h] :: cui@input()
	end for
	
	var dx: []int :: [0, 1]
	var dy: []int :: [1, 0]
	do mp[0][0] :: 0
	for h(0, H - 1)
		for w(0, W - 1)
			var x0: int :: w
			var y0: int :: h
			var v0: int :: mp[y0][x0]
			;do cui@print("\{x0} \{y0}\n")
			for i(0, 1)
				var x: int :: x0 + dx[i]
				var y: int :: y0 + dy[i]
				if(x = W | y = H)
					skip i
				end if
				var v: int :: v0 + 1 + ((m[y][x] = 'k') ?(x + y, 0))
				if(mp[y][x] = 0)
					do mp[y][x] :: v
				elif(v < mp[y][x])
					do mp[y][x] :: v
				end if
				;do cui@print("(\{x0}, \{y0})→(\{x}, \{y}) \{v}→\{mp[y][x]}\n")
			end for
		end for
	end for
	{
		for h(0, H - 1)
			for w(0, W - 1)
				do cui@print("\{mp[h][w]}\t")
			end for
			do cui@print("\n")
		end for
	}
	
	var ans: int :: mp[H - 1][W - 1]
	do cui@print("\{ans}\n")
end func