I'm wanting to know all the possiblities of order of a set of numbers which have "a", "b", or "c" in front. Like: "a1,a2,a3,a4,a5.......b1,b2,b3......c1,c2,c3.......c19,c20" I understand _ArrayPermute(), yet the only orders I'm interested in must consist of have each series of numbers for each letter in order. Like: "a1,b1,a2,a3,c1....." and so forth. Not "a1,b1,a3,c1,a2" as "a3" is before "a2" First off, I've made a work around so I don't recieve the error of exceeded array limit when