ok, in a 20 questions style id be asking the following (assumin i get yes to my answers):

is it character substitution?
dose the character standard change with every letter?

ok thats only 2 outta 20 but those are my thought on it. i am thinking that its character substitution cause its just characters, but then that it changes characters cause thers 3 seperate 1 character groups in it and, assuming that it is in english, theres only 3 one character words in the dictionary, I, A, and j (tho ill be damned if i have ever see j used as a word before)

these are great, i got a college interview tomorrow and need to wake up in 7 hours and im spending time cracking sweet nothings, i love this place, there should be more challenges, there REALLY fun