Cannot execute some command

I have tried the following

```
(base) user@host:folder$ llm cmd show the first three lines of every .md file in this directory using find and head
Multiline command - Meta-Enter or Esc Enter to execute
> find . -name "*.md" -exec head -n 3 {} \; 
```

When I press enter, it does nothing. I think some special letters might caused the problem.