3+3=, 6, 7+7=, 14, 10+10=, 20, 1+1=, 2, 8+8=, 16, 2+2=, 4, 4+4=, 8, 5+5=, 10, 6+6=, 12, 9+9=, 18, 11 + 11 = , 22, 12 + 12 = , 24.

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