13-4= 13-5= 12-4= 13-4=
14-8= 17-9= 11-6= 12-5=
17-9= 12-7= 14-9= 14-8=
11-8= 11-2= 11-5= 15-7=
15-9= 16-8= 13-5= 11-6=
15-9= 13-4= 11-7= 13-9=
11-5= 14-7= 12-6= 11-3=
17-9= 10-8= 16-3= 12-3=
12-8= 15-8= 15-8= 12-8=
17-8= 12-7= 18-9= 11-4=
11-2= 13-9= 14-8= 14-7=
13-8= 20-3= 11-9= 10-1=
15-6= 18-9= 16-7= 14-7=
12-8= 13-9= 10-3= 17-8=
13-6= 13-4= 13-9= 11-2=
13-6= 8+7= 11-3= 14-5=
6+9= 15-7= 17-8= 14-7=
9+6= 11-7= 12-7= 3+8=
14-6= 13-5= 4+8= 12-9=
8+6= 16-7= 13-4= 11-9=