["e3-e6","e18-e15","b3-e3","b18-e18","j7-h7","k15-l14","p3-p5","i15-i14","p6-m9","n14-l12","m9-o7","p18-p16","o7-l10","n13-l11","k8-k9","j12-h14","i3-i16","i19-i18","i15-i16","i19-i18","i15-i16","f17-g17","j11-k10","p16-p13","f6-n14","q14-p14","m14-m16"]