["i8-i6","b15-e12","p3-p6","s15-p12","s3-p3","h15-k12","e3-e6","c18-c8","e6-e7","b8-c7","f7-e8","b6-c7","f7-e8","g12-e10","b3-e3","p12-m9","l6-l7","l12-l9","i4-i16","m13-k15","h15-i16","e13-h16","i15-j16"]