struct BlackjackCard {
    // nested Suit enumeration    enum Suit: Character {        case spades = "♠", hearts = "♡", diamonds = "♢", clubs = "♣"    }
    // nested Rank enumeration    enum Rank: Int {        case two = 2, three, four, five, six, seven, eight, nine, ten        case jack, queen, king, ace        struct Values {            let first: Int, second: Int?        }        var values: Values {            switch self {            case .ace:                return Values(first: 1, second: 11)            case .jack, .queen, .king:                return Values(first: 10, second: nil)            default:                return Values(first: self.rawValue, second: nil)            }        }    }
    // BlackjackCard properties and methods    let rank: Rank, suit: Suit    var description: String {        var output = "suit is \(suit.rawValue),"        output += " value is \(rank.values.first)"        if let second = rank.values.second {            output += " or \(second)"        }        return output    }}

let heartsSymbol = BlackjackCard.Suit.hearts.rawValue// heartsSymbol is "♡"