mod external_mod {
    
    pub fn public_func() {
        println!("Public function called\n");
    }

    fn private_func(){
        println!("Private function called\n");
    }
    
    pub fn private_func_accessor() {
        println!("Accessing private function with a public function");
        private_func();
    }

    mod internal_mod {
        pub fn public_internal_func() {
            println!("Public function inside internal mod called\n");
        } 
    }

    pub fn internal_mod_accessor() {
        println!("Accessing internal mod with a public function");
        internal_mod::public_internal_func();
    }
}

fn main() {
    external_mod::public_func();

    external_mod::private_func_accessor();

    external_mod::internal_mod_accessor();
}