This is the best approach to solve the QueB at Tower 7, originally posted by ANNA papers 1993, Modified by KHAM 2013.

== HYANAP == 

% RTD 7 : 00 11 14 41 11 21 18 11 12
% BLU 7 : 00 21 18 11 12 90 00 01 11 
% GTN 7 : 00 90 00 01 11 21 18 11 12

Keys | 11: PRP, 21/12: RRS

Enjoy!