defmodule Rand do
  def init do      # Initialize the random values.
    << a :: 32, b :: 32, c :: 32 >> = :crypto.strong_rand_bytes(12)
    :random.seed(a,b,c)
  end

  def num do        # Returns a value between 0.0 and 1.0.
    init
    :random.uniform
  end

  def char(list) do  # Returns a random letter or a space.
    Enum.at(list, :random.uniform(length(list)) - 1)
  end
end