There are 4 folders in my current working directory. Each folder contains several files named with the following format :

```
HEXA DECA - Season 01 Episode 01 - name of episode
HEXA DECA - Season 01 Episode 02 - name of episode

```

I want to rename this to :

```
HE'XA DECA - S01E01 - name of episode
HE'XA DECA - S01E02 - name of episode

```

`sed` is bit too daunting for me. What's the best way to achieve this ?