17-2= 14-1= 15-10= 4+7= 12-3= 13-1= 12-8= 19-18= 20-0= 6+8= 10+0= 12+3= 19+1= 12-5= 2+10= 4+16= 13+1= 15-8= 11-9= 17-9= 17-15= 19-3= 12+3= 6+7= 16-12= 18-4= 18-16= 19-17= 11-2= 15-1= 20-17= 7+4= 20-7= 11+0= 14-6= 18-5= 16+3= 17-11= 15-15= 19-18= 11-10= 11-0= 15+2= 16-15= 13-9= 15-7= 13+2= 4+13= 19+1= 14-11= 7+8= 13-8= 17-6= 5+7= 17-14= 10+3= 14-5= 18+0= 9+11= 18-5= 17-17= 11-3= 20+0= 9+5= 4+7= 0+13= 19-16= 13-5= 15-15= 15-13= 2+17= 15+2= 18-8= 20-16= 18-6= 20-0= 9+4= 18-15= 13+4= 14-9= 17-0= 13-11= 8+12= 7+12= 13-5= 14-14= 2+18= 8+12= 9+11= 9+7= 5+13= 17+0= 12+5= 16-6= 20-2= 19-3= 19-12= 19-12= 17-11= 0+12= 11+7= 16-2= 20-3= 5+10= 18-3= 10-10= 18-14= 10+9= 11-9= 13+7= 18-3= 20-2= 4+15= 7+10= 1+16= 11-5= 13-5= 11+5= 2+10= 16-3= 15-3= 5+8= 19-9= 15-1= 1+17= 16-0= 14-0= 20-15= 17-0= 17-6= 20-