["c6-c9","s15-q13","i8-i6","r18-r8","r3-r6","o18-s14","c3-c9","l18-o18","f3-b7","o18-r18","i5-i4","i18-l15","i3-i13","l15-k14","l3-i3","f18-i15","k6-m8","k14-o10","o3-g11","o10-j5"]