let utterance = AVSpeechUtterance(string: "Hello world") // Speech: Hello world
let utterance = AVSpeechUtterance(string: "❤️") // Speech: [Red heart]; See paragraph for more description
let utterance = AVSpeechUtterance(string: "$100.99 ") // Speech: One hundred dollars and ninty nine cents
let utterance = AVSpeechUtterance(string: "10cm") // Speech: Ten centimeters
let utterance = AVSpeechUtterance(string: "@ $ % & = + ?") // Speech: [at] [dollar sign] [percent] [and] [equal] [plus]
let utterance = AVSpeechUtterance(string: "hdbjfcng") // Speech: H-D-B-J-F-C-N-G