["f6-f9","c18-c16","f3-e4","c15-c8","g11-e9","b8-c7","j7-g7","c7-e7","e4-f5","f8-f7","c3-c16","f18-d16","o6-o9","e15-l8","p11-m8","j10-l8","i3-i13","m14-k14","h13-i14","i18-i16","i12-k12","p15-m12","j12-k13","l10-l13","f4-i4","i16-i15","i4-i7","e7-j2"]