O-1 vs. O-1E requirements

Just curious what the requirements are to be enter as an O-1E (officer, prior enlisted).

I have just a few days short of 4 years prior enlistment time, but I've read that the Air Force requires 4 years and 1 day prior enlistment to qualify as an O-1E.
I would fall literally less than week short of that requirement. I thought that I've read someplace else that the military can use a "point system" to see if a person would qualify for the 'E'. Is that true because I cannot really find anything about there while searching online?

Any information regarding the O-1 to O-1E would be helpful!
Thanks.