["i6-i9","h18-h16","h3-h8","i15-i11","h8-c13","i11-i7","m7-j7","l18-l16","e6-g8","g15-e13","b13-c13","f12-e13","b13-c14","c18-c16","d12-d14","c17-c16","i8-f11","d16-d13","g9-e11","i18-i15","e11-d12","l15-m15","e3-e6","j15-j5"]