/**
  * Display the specified resource.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function show($level)
 {
     $tag = PostDificulty::where('level', $level)->firstOrFail();
     $posts = Post::with('tags')->where('post_dificulty_id', '=', $level)->orderBy('created_at', 'desc')->paginate(15);
     return view('post-dificulty.show', compact('tag', 'posts'));
 }