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