this was on facebook, i clicked forward but the answer was not obvious to me!lol

what's wrong here

AAA
BBB
CCC
DDD
EEE
FFF
GGG
HHH
III
JJJ
KKK
LLL
MMM
NNN
OOO
PPP
QQQ
RRR
SSS
TTT
UUU
VVV
WWW
XXX
YYY
ZZZ

Did you know that 80% of UCSD students could not find the error above? Repost this with the title "what's wrong here", and when you click "Forward ", the answer will be really obvious.