class Person
  def initialize(fname, lname, mname, birthyear)
    @first_name  = fname
    @last_name   = lname
    @middle_name = mname
    @birthyear   = birthyear
  end
  def  age
    2017-@birthyear
  end
  def getname
    if age>=25 
      @first_name+" "+@middle_name
    else @first_name
    end
  end
end
p=Person.new("Тарас","Терпилихо","Свиридович",1965)
puts p.age
puts p.getname
p1=Person.new("Алла","Рижій","Андріївна",2004)
puts p1.age
puts p1.getname