12-12=

11-1=

14-7=

14-8=

12-2=

19-8=

16-15=

16-15=

11-2=

18-15=

11-4=

15-6=

17-11=

13-3=

14-4=

18-18=

17-9=

20-19=

11-7=

16-7=

20-15=

13-11=

11-4=

13-5=

20-15=

12-5=

14-9=

12-2=

19-13=

12-1=

15-13=

16-4=

19-1=

20-12=

17-12=

13-5=

14-9=

15-4=

19-9=

16-13=

14-3=

13-10=

11-4=

17-1=

14-2=

12-12=

19-8=

18-9=

12-5=

14-9=