Empty Spaces

[Intro: Roger Waters, James Guthrie]
​yakO
!enohp eht no s’enyloraC, regoR
…tnoflahC ,mraF ynnuF eht fo erac ,kniP dlO ot rewsna ruoy dnes esaelP
​egassem terces eht derevocsid tsuj evah uoY
​snoitalutargnoC
​akuL ,olleH

[Verse: Roger Waters]
What shall we use to fill the empty spaces
Where we used to talk?
How shall I fill the final places?
How should I complete the wall?