19-1= 19-2= 19-3= 19-4=
19-5= 19-6= 19-7= 19-8=
19-9= 18-1= 18-2= 18-3=
18-4= 18-5= 18-6= 18-7=
18-8= 17-1= 17-2= 17-3=
17-4= 17-5= 17-6= 17-7=
16-1= 16-2= 16-3= 16-4=
16-5= 16-6= 15-1= 15-2=
15-3= 15-4= 15-5= 14-1=
14-2= 14-3= 14-4= 13-1=
13-2= 13-3= 12-1= 12-2=
16-0= 17-0= 18-0= 19-0=