Assuming I have the following string:

```
string = "path/stack/over_flow/Pedro_account"

```

I am intrested in matching the first 2 characters after the last / and before the first \_. So in this case the desired out put is:

```
Pe

```

What I have so far is a mix of substr and str\_extract:

```
substr(str_extract(string, "[^/]*$"),1,2)

```

which of course will give an answer but I belive there is a nice regex for it as well, and that is what I'm looking for.