User blog comment:Boboris02/Large number combinatorics I:COX function/@comment-1605058-20170130220310/@comment-30118230-20170131195116

It's always grouped into groups of three.

Now while I'm typing I can't think of any legal 12 element string,but I remember how I somehow got that string back when I first thought of the function.I don't know how I got that,maybe it was a mistake of mine or maybe there is such a legal string and I'm just not able to find it .Also,if you switch the symbols around in any legal string it will still be legal,so then there are always multiple winning strings.