Suppose I have a list of protein sequences:

```
VLQSDLYTLSSSVTV
WKLYSKVKPLLNVAR
YNTSLRTMPTMIWTW
GVDFYSTITRARFEE

```

I want to extract only the last 4 residues (last four characters) from the sequences (in reverse order), such as

```
VTVS
RAVN
WTWI
EEFR

```

How to do that with Python code?