22
FIT100
Thinking of the Input
•Roses are ¿red¿¿Violets are ¿blue¿¿...
•Deleting the single ¿  deletes them all!
•Placeholder technique …
•Substitute a placeholder for the longer string
• ¿¿ û  #
•Yielding
•Roses are ¿red#Violets are ¿blue#…
•Next, delete the shorter string
• ¿ û e
•Yielding
•Roses are red#Violets are blue#…