Lets say I have these strings:

```
this_string = 'US/Canada'

that_string = '/fowardslash @/t t/'

```

I want to be able to `re.sub()` the strings with these 2 goals:

1) replace all the `/` that does **not** have letters before and after it with nothing `''`.

2) replace all the `/` that **HAS** a letter before and after it with a space.

So what I want to end up with would be something like this:

```
this_string = 'US Canada'

that_string = 'forwardslash @t t' 

```

---

I currently have this `re.sub('[^A-Za-z0-9\s]+','', this_string)`

which does the 1st goal but not the 2nd.

I would get `this_string = 'USCanada'`