public class NewSwitch {
    public static void main(String[] args) {
        var day = "SAT";
        var today = "";
        switch (day) {
            case "SAT", "SUN" -> today = "주말";
            case "MON", "TUS", "WED", "THU", "FRI" -> today = "주중";
            default -> System.out.println("Error");
        }
        System.out.println(today);
    }
}