I'm new to regular expresions. I have a gigantic text. In the aplication, i need words of 4 characters and delete the rest. The text is in spanish. So far, I can select 4 char length words but i still need to delete the rest. 

This is my regular expression

```
\s(\w{3,3}[a-zA-ZáéíóúäëïöüñÑ])\s

```

How can i get all words with 4 letters in asp.net vb?