["i6-i9","l15-l12","s6-p9","o15-o12","r3-r13","r18-r15","r12-r13","r16-r15","r12-r13","r16-r15","p9-o10","k12-m10","l6-l8","o9-n9","i9-i12","f15-f12","k9-l9","o18-r15"]