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