WF197607 .
A*4 B*4 C*2 D*2 E*2 F*1 b*24 c*1 M6*12 M6*38 a*12 Step1 b b a B B a b a b A a A c
Step2 c b b b b C b Step3 a E D a E a b b D a b Step4 c b b b b F c
