% ∝ ' ()* + ,( -./* ! Dir $ = { ⁄ * 3 , ⁄ * 3 , ⁄ * 3 } % = {11, 11, 11} ∝ ⁄ * 3 *7× ⁄ * 3 *7× ⁄ * 3 *7 " Dir $ = { ⁄ * 3 , ⁄ 7.: 3 , ⁄ *.* 3 } % = {11, 11, 11} ∝ ⁄ * 3 *7× ⁄ 7.: 3 *7× ⁄ *.* 3 *7 # Dir $ = { ⁄ ;.< 3 , ⁄ 7.* 3 , ⁄ 7.* 3 } % = {11, 11, 11} ∝ ⁄ ;.< 3 *7× ⁄ 7.* 3 *7× ⁄ 7.* 3 *7 !(= 4.86×10/*B ) " (= 4.39×10/*B ) # (= 1.44×10/37 ) →