The first one I played dozen and columns but only 12 13 21 23 31 32.
The other two was denzie's rule completley. In other words like the first graph but including 11 22 33 00 aswell but without columns.
Wow. Wasnt expecting that. 1St graph looks like many uniques occured on columns. Something to think about
Looks like denzies idea isnt too shabby