A means tamas. U means Rajas. M means satvam. A means mathematical knowledge stream. U means literary(communication skills) knowledge stream. M means biochemical knowledge stream. So three qualities in two parts will be to stay truth(power) at the ultimate.

There are just three(darkness A- energy U - purity M) streams of knowledge to reach and stay in truth(power).
But the point is that all the three streams of knowledge can't stay as truth(power).
ONLY SOCIAL(fourth order) which is awkward appearance will be TRUTH(power) IN REALITY.