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