0 X 2 , 1 X 2 , 2 X 2 , 2 X 3 , 2 X 4 , 2 X 5 , 2 X 6 , 2 X 7 , 2 x 8 , 2 X 9 , 2 X 10 , 2 x 11, 2 x 12,

Multiplying by 2 (PAS Grade 3)

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