In the description, it says:

If the final result is longer than 140 characters, it must return false.

If the input or the result is an empty string it must return false.

While implementing my solution in Scala, I initially returned "false" as a string for this case. However, the tests were expecting an empty string instead. I suggest updating the description to specify that false should be represented as an empty string in the output.

Scala is indeed a fascinating language!