Sub-sub bullets - how to make i) ii) rather than repeating a) b)

Hi all,

I am working on a project that includes sub-sub bullets. i.e. when indenting numbered lists it would go from the number, to letter, to i's. 

1 > a > i) ii)  etc.

Unfortunately, Rise only goes 1 > a > a etc.

(See screenshots for better example!).

Is there any way to change the indent numbering formats?

Thank you!