Solve the programming task below in a Python markdown code block.
Gordon Ramsay shouts. He shouts and swears. There may be something wrong with him.

Anyway, you will be given a string of four words. Your job is to turn them in to Gordon language. 

Rules:

Obviously the words should be Caps,
Every word should end with '!!!!',
Any letter 'a' or 'A' should become '@',
Any other vowel should become '*'.
Also feel free to reuse/extend the following starter code:
```python
def gordon(a):
```