defmodule DNA do
  def encode_nucleotide(code_point) do
    # Please implement the encode_nucleotide/1 function
  end

  def decode_nucleotide(encoded_code) do
    # Please implement the decode_nucleotide/1 function
  end

  def encode(dna) do
    # Please implement the encode/1 function
  end

  def decode(dna) do
    # Please implement the decode/1 function
  end
end