Easiest things first.
=+ all=.*(0 ken)
=+ ^= vay ^- (list {p/@tas q/path})
:~ [%$ /zuse]
- [%f /vane/ford]
- [%c /vane/clay]
- [%g /vane/gall]
- [%a /vane/ames]
[%b /vane/behn]
[%d /vane/dill]
+ [%a /vane/ames]
+ [%c /vane/clay]
+ [%g /vane/gall]
[%e /vane/eyre]
+ [%f /vane/ford]
+
==
|- ^+ all
?~ vay all
