11-4=

13-12=

12-11=

13-12=

11-6=

16-0=

17-15=

15-3=

17-5=

20-16=

14-6=

14-1=

19-11=

15-4=

17-15=

20-0=

20-10=

13-13=

16-5=

14-5=

11-7=

17-12=

19-1=

11-10=

13-1=

19-16=

19-3=

12-10=

13-4=

18-1=

13-10=

16-14=

13-3=

16-1=

12-10=

15-3=

16-4=

11-7=

12-9=

19-9=

16-6=

18-10=

18-9=

20-19=

12-5=

12-11=

15-6=

20-20=

15-12=

16-15=