59. In a project, Yi works alone for 4 days, then Jia and Bing work together for 6 days, and the remaining work is completed by Jia alone in 9 days. It is known that the amount of work completed by Yi is $\frac{1}{3}$ of Jia's work, and the amount of work completed by Bing is twice that of Yi. The number of days Jia, Yi, and Bing would each need to complete the project alone is $\qquad$
$\qquad$
$\qquad$.
Reference answer: $30,24,18$