Congratulations, you have found the secret message.
Please send your answer to Old Pink in care of the Funny Farm.
(Old Pink, Carolyn is on the phone)
What shall we use to fill the empty
Spaces where we used to talk
How shall I fill the final places
How shall I complete the wall
Lyrics taken from http://www.lyricsmode.com/lyrics/p/pink_floyd/empty_spaces.html