It is a common belief that the word "an" is to be used before a word beginning with a vowel. However, that is according to the sound of the beginning of the word, not the specific letter. "University" is pronounced as if it starts with a "Y" which is a vowel. So it is not the literal letter at the beginning of the word, but the sound it makes that determines whether "a" or "an" is used.
Let us or let's can go before the word go.
brainstormfirestormhailstormrainstormsandstormsnowstormthunderstormwindstorm
One such word is dance floor.
precede
chamber
The word curiosity comes after the word curious.
Results will be issued on or before 25/3/09.
never
task
Precede.
Sea.
The word "hilarious" comes before "hilarity" and after "hilar".