riddle

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

yay is the answer 

yay is tha answer 

that is a 3 letter word not a four letter wordd

ok 

Look at the riddle very carefully

 and can still be read from left to right?

anna

no

noon

haha

wow, 14 days after I posted this and someone finally got it just wow

yay