Reverse

class Main {
    public static void main(String[] args) {
        System.out.println("Hello World!");
        reverse("Это так!");
    }
    
    private static void reverse(String s) {
        String res = "";
        for (int i = s.length() - 1; i >= 0; i--) res += s.toCharArray()[i];
        System.out.println(res);
    }
}