Correct answer marked as incorrect

"Protocols in Swift" : Challenge task 2 of 2

For the next step, create a struct named Dog that conforms to Pet (See the attached code)

This gives the "Bummer" response.

However, if I put this in an Xcode 8 playground (iOS), it does compile, and I can even check the results with: let fido = Dog(numberOfLegs: 4, cuddlyName: "Fido") // <- lldb_expr_30.Dog let fidosLegs = fido.numberOfLegs // <- 4 let fidosName = fido.cuddlyName // <- "Fido"

let aDog: Pet = fido // <- lldb_expr_30.Dog let aDogsLegs = aDog.numberOfLegs // <- 4 let aDogsName = aDog.cuddlyName // <- "Fido"

This clearly conforms to 'Pet' as I can access the 'numberOfLegs' (inherited from the Animal protocol), and the 'cuddlyName' (from Pet protocol) properties on the 'aDog' reference which is of type 'Pet'

It should not have said, "Bummer".

Please correct this so I can continue.

protocol Animal {
  var numberOfLegs: Int { get }
}

protocol Pet : Animal
{
  var cuddlyName: String { get }
}

struct Dog : Pet
{
  var numberOfLegs: Int
  var cuddlyName: String
}