Task
Write `stats(text, words)` that returns a tuple of three ints:
1. `len(text)` β total chars including spaces
2. count of vowels (a, e, i, o, u β lowercase only) in `text`
3. length of the longest word in the `words` list β use `max()` with a `key=` lambda
Then call `stats("hello world", ["hello", "world", "ok"])` and print each value on its own line.
Expected output:
```
11
3
5
```