Condensed Cases

Apple's new programming language, Swift, allows two style of case statements: 1) one Enum case on each line, or 2) multiple Enum cases on a single line. Convert the following from the first case (no pun intended) to the second type.

Input

enum PlaybackRequestType {
    case Next
    case Previous
    case Play
    case Stop
}

Output

enum PlaybackRequestType {
    case Next, Previous, Play, Stop
}