["i6-i9","i15-i12","i9-i10","e15-h12","e6-h9","j12-i11","k6-n9","s15-p12","o9-o10","o15-o12","o6-o9","o12-o11","q7-r7","o11-o9","t6-q9","n7-p9","r3-r9","p18-p16","r9-r15","o16-p15"]