public class SwitchExpressionDemo {
    static String size(int n) {
        return switch (n) {
            case 0 -> "zero";
            case 1, 2, 3 -> "few";
            default -> "many";
        };
    }

    public static void main(String[] args) {
        for (int i = 0; i < 5; i++) {
            System.out.println(i + " -> " + size(i));
        }
    }
}