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x/6 = 1/sqrt(1^2+2^2+2^2); y/6 = 2/sqrt(1^2+2^2+2^2); z/6 = 2/sqrt(1^2+2^2+2^2)
x/6 = 1/sqrt(1^2+2^2+2^2); y/6 = 2/sqrt(1^2+2^2+2^2); z/6 = 2/sqrt(1^2+2^2+2^2)
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