["c3-c5","r18-r16","e6-h9","o15-o13","h9-k12","l15-l14","i10-k12","r15-r8","r3-r6","r9-r8","r5-r6","r9-r8","r5-r6","o13-o11","o6-o9","h14-k14","p9-m12","l15-l14","c6-c13","l14-l11","l6-l9","g15-e13","b13-c13","c18-c15","e12-d13","c16-b15","d12-c13","c16-b15"]