record Navi
    function constructor(self) begin
        return self
    end
    function print(self) begin
        print("A Navi running Copland OS...\n")
    end
end
record Person
    function constructor(self, name, age) begin
        self.name = name
        self.age = age
        self.item = Navi()
        return self
    end
    function befriend(self, other) begin
        print(self.name, " is friends with ", other.name, "\n")
    end
end
lain = Person("Iwakura Lain", 14)
alice = Person("Mizuki Alice", 14)
lain.befriend(alice)
lain.item.print()
function greet(self) begin
    print("My name is ", self.name, "\n")
end
Person.greet = greet
lain.greet()