While we didn't cover this in class, you could use regex to validate user input, but it'd be tough because movies could really be named anything. But for example, if you wanted to make sure that the movie has more than two words in it, you could use regex like so:

```ruby
if user_search =~ \^\w+{2,}\
  search_list(user_search)
else
  puts "There aren't any movies that are less than two words, try again"
end
```