You're telling it to take the first 14 chars as a group and remove all the spaces. What you're left with should be nothing because you've dropped the remainder. But you don't indicate that's the case. What do you get as a result?
EDIT
Should clarify that would be the case if the first 14 were spaces. Not sure what your input is. I asked for an output example, but you should provide the input for it as well as I get varying results depending on what I feed it.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.