**This question has been asked before and I don\'t understand what they did and how they wrote it. Please don\'t copy & paste the other answer. Solution GROUP IS S3 .. S3 HAS 6 ELEMENTS ..THEY ARE F1 = [1] = F[2]=[1,2]= F3=[1,3]= 1 2 3 1 2 3 1 2 3 1 2 3 2 1 3 3 2 1 F4=[2,3] F5=[123]= F6=[132]= 1 2 3 1 2 3 1 2 3 1 3 2 2 3 1 3 1 2 H = [ I , F ] THERE IS CONFUSION ON SYMBOLS.