10-5= 6-4= 7-3= 8-2=
9-0= 9-4= 8-5= 7-6=
10-5= 6-0= 8-2= 7-3=
5-1= 6-0= 4-2= 6-3=
7-6= 5-4= 2-0= 9-6=