i'd no idea what was used to encrypt it, but not many 3 letter words in english and just got lucky as i was writing them down, it hit me that it said happy new year.
yes, just guessed.
but once i put the words in there wasn't any discrepancies to the code, ie. j = e and f = a, in two words and the double u would be correct for p so went with it.
happy new year.
did think about writing the alphabet down and seeing if i could work out what the connections were but didn't bother.
do now know tho that they were slipped 5 places to the right.