2+3= 1+4= 3+0= 0+5= 4-2=
6-5= 5-2= 6-4= 2+2= 5-0=
3+1= 4+3= 3-2= 5-4= 3+3=
7-2= 2+4= 5-1= 2+1= 4+1=
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