By my last post i mean there are 3 numbers between 7 and 11 (8, 9, 10) and 3 letters between J and N (A, S, O). And J is "equivalent" to 7 via methods previously discussed, as is N.
I feel like an idiot. To think I actually looked at the wikipedia article for "7-Eleven" a few hours ago to see if I could find out the name of whoever was the owner of the company.