require_relative "add.rb"
require_relative "boolean.rb"
require_relative "lessthan.rb"
require_relative "machine.rb"
require_relative "multiply.rb"
require_relative "number.rb"
require_relative "variable.rb"
require_relative "donothing.rb"
require_relative "assign.rb"
require_relative "if.rb"
require_relative "sequence.rb"
require_relative "while.rb"
