Bronze Challenge - Sets

   let myCities = Set(["Atlanta", "Chicago", "Jacksonville", "New York", "San Francisco"])
    let yourCities = Set(["Chicago", "San Francisco", "Jacksonville"])


    let yourCitiesCheck = yourCities.isSubset(of: myCities)
    let myCitiesCheck = myCities.isSubset(of: yourCities)


    let checkTuple = (yourCitiesCheck, myCitiesCheck)


    switch checkTuple {
    case (true, false):
        print("I've been to all of the cities you've been to, but the reverse isn't true.")
    case (true, true):
        print("We've been to exactly the same cities.")
    case (false, true):
        print("I've not been to all of the cities you've been to, but you've been to all of the cities that I've been to.")
    default:
        print("We haven't been to any of the same cities")
    }