Question: I have to increase the size of the first letter of every `P` elements that are not `class="ejemplo"` or `id="lectura"`. 

This works perfectly:

```
p::first-letter {
  font-size: 300%;
}

```

But when I try to match the requirements and I do this, it doesn't work:

```
p::first-letter:not([class="ejemplo"]):not([id="lectura"]) {
  font-size: 300%;
}

```

I'm beginner in CSS, so what am I doing wrong?

Answer: 
Use:

```
p:not([class="ejemplo"]):not([id="lectura"])::first-letter {

```

Instead:

```
p::first-letter:not([class="ejemplo"]):not([id="lectura"]) {

```
You should add `::first-letter` at last

```css
p:not(.ejemplo):not(#lectura)::first-letter{
  font-size: 300%;
}
```

```html
<p>test</p>
<p id="lectura">test</p>
<p class="ejemplo">test</p>
```