12-11=

16-8=

15-5=

18-7=

11-10=

12-1=

13-13=

12-7=

18-3=

14-11=

14-2=

20-9=

13-2=

18-7=

17-14=

15-13=

18-15=

12-0=

11-0=

17-6=

12-7=

17-15=

16-1=

14-7=

13-11=

14-0=

19-7=

12-8=

13-0=

14-12=

18-2=

20-11=

19-8=

20-19=

13-9=

18-10=

11-9=

15-2=

11-3=

16-4=

15-14=

16-11=

11-7=

14-7=

16-12=

16-11=

13-4=

15-9=

19-14=

20-0=