Irregular beat grouping (7/8-beat etc.)

[Akira]

Lilypond version 2.13 does not accept this:

        \overrideBeamSettings #'Score #'(7 . 8) #'end    #'((* . (2 2 3)))
        \overrideBeamSettings #'Score #'(9 . 8) #'end    #'((* . (2 3 2 2)))%}

So, I can get only the example of right, which confuses me.
Please tell me how to solve this and get the example of left.

beatgrouping.PNG
Description: PNG image