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