["r6-r9","r18-r16","n6-p8","r15-r11","p8-q9","r12-l12","r3-r8","l15-l14","r9-r16","o18-q16","t14-s15","p16-q16","s7-p7","i18-i15","p6-n8","i15-i8","e6-g8","l12-l10","m6-k8","l11-l5"]