How can I convert:

```
List(1,1,1,1,4,2,2,2,2)

```

into:

```
List(List(1,1,1,1), List(2,2,2,2))

```

Thought this would be the easiest way to show what I'm looking for. I am having a hard time trying to find the most functional way to do this with a large list that needs to be separated at a specific element. This element does not show up in the new list of lists. Any help would be appreciated!