"How many Fs are there in the following sentence?:
FINISHED FILES ARE THE RE
SULT OF YEARS OF SCIENTI
FIC STUDY COMBINED WITH
THE EXPERIENCE OF YEARS..."
1) How is it supposed to work/ why is it a brain teaser?
2) Is it just a hoax?
3) How many Fs can you find?
::Edit:: "the following sentence" = instructions, not the brain tease itself.