var nokiaPhone = new Phone("Nokia 6610");
var kim = new Employee("Victorya", "Kim", 
    new Phone("iPhone 15"));

System.out.println(nokiaPhone.model);
System.out.println(kim.personalPhone.model);

class Phone {
    public String model;

    public Phone(String model) {
        this.model = model;
    }
}

class Employee {
    public String firstName;
    public String lastName;
    public Phone personalPhone;

    public Employee(String firstName, String lastName, Phone personalPhone) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.personalPhone = personalPhone;
    }
}