The date is 20/2/2018. You are a detective and have been contacted by the police officer to help to crack a case. "Our CEO, Tom has been murdered in his room just now. The only suspects are Norman, Hana, and Anthony. The only clue we could find was the message left on his computer: cftgbhu." the police officer said. You inspect the room more and don't seem to see any more clues.
Who is the murderer?