class Program
  def initialize
    @instructions = []
    (2 + rand(4)).times do
      @instructions << random_instruction
    end
  end

  private

  def random_instruction
    case rand(2)
    when 0
      [:load, (65 + rand(26)).chr]
    when 1
      [:output]
    end
  end

  def to_s
    @instructions.map do |instruction, *params|
      case instruction
      when :load
        "load #{params.first.inspect}"
      when :output
        "output"
      end
    end.join("\n")
  end

  def execute
  end
end