["c3-c6","r18-s18","c6-b6","t18-s18","b6-b13","r18-r15","b13-e13","r15-r8","e13-e16","r8-r5","e16-e17","r5-r4","e17-f17","r4-r3","f17-g17","l15-l13","g17-g18","l13-l11","f6-f8","h15-j13","f8-f9","j13-k12","f9-f11","l11-l8","i6-i8","l9-l8","i8-i9","p15-n13","o6-o7","n13-m12","o7-o8","l12-l10","o8-o9","l10-l9","o9-o10","l8-l5"]