An attempt at extracting grammar from vord order statistics.

[RobGea]

there may be some bugs in the searching algorithm, It is not very stable, the groups that come out are different every time. 
Probably some memory in python that gives a different order every time.

idk if this is useful to you but some causes could be.
Dictionaries : Python version <3.7 Dictionaries are unordered.
Sets : Always unordered.
Memory: (dont know what this is called but ive come across it).  Fix : Close all instances of Python between code runs.
Scope(?): Lists, ( Dictionaries(?), watch out if dictionary value is a list as well ) , Mutable, Pass-by-reference ( out of my hobbyist league but its caused me some trouble on occasion )