hollow square

class Main {
    public static void main(String[] args) {
        int l = 5;
        int b = 5;
        for(int i = 1; i <= b; i++){
            for(int j = 1; j <= l; j++){
                if(j == 1 || j == l || i == 1 || i == b){
                    System.out.print("*");
                }
                else{
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }
}