huh? i don't understand... perhaps providing a snippit of your actual code would help clarify things...
you're using regex's aren't you? if not, read up on them here:
perldoc re
sounds like you could probably use this or something similar depending on your actual source data...
m/ASP[a-z]/i
# thats a literal 'ASP'
# followed by a character class of 1 of any letter from a-z