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