["j6-g9","p15-n13","n6-q9","n11-m12","r6-r8","h14-j14","i3-i16","l13-k14","h14-i15","l14-k15","h15-i16","i19-i18","r9-r13","r18-r15","r12-r13","r16-r15","r3-r13","q16-r15","r12-r13","p17-r15","q12-r13","p17-r15","f11-f9","i18-i4","e8-h5","i2-j3"]