public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Introduce la altura");
        int alt = sc.nextInt();
        System.out.print("Introduce la anchura");
        int anch = sc.nextInt();
        String aux = "*";
        for (int i = 0; i < alt-1; i++) {
            System.out.println(aux);
        }
        for (int j = 0; j < anch; j++) {
            System.out.print(aux + " ");
        }
}