Phone *nokiaPhone = [[Phone alloc] init];
nokiaPhone.model = @"Nokia 6610";
Phone *iPhone18 = [[Phone alloc] init];
iPhone18.model = @"iPhone 18";
Employee *kim = [[Employee alloc] init];
kim.firstName = @"Victorya";
kim.lastName = @"Kim";
kim.personalPhone = iPhone18;
@interface Phone : NSObject
@property NSString *model;
@end
@interface Employee : NSObject
@property NSString *firstName, *lastName;
@property Phone *personalPhone;
@end