hackling

defmodule Scrabble do
  def score(nil), do: 0
  def score(""), do: 0
  def score("A"), do: 1
  def score("B"), do: 3
  def score("C"), do: 3
  def score("D"), do: 2
  def score("E"), do: 1
  def score("F"), do: 4
  def score("G"), do: 2