3+3=, 6, 7+7=, 14, 10+10=, 20, 1+1=, 2, 8+8=, 16, 2+2=, 4, 4+4=, 8, 5+5=, 10, 0+0=, 0, 6+6=, 12, 9+9=, 18, 11+11=, 22, 12+12=, 24, 15+15=, 30, 16+16=, 32, 14+14=, 28, 20+20=, 40.

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