::
%.  ["Infancy" [0 2]]
|=  {tep/tape {a/@ud b/@ud}}
=/  ran/(list @ud)  (gulf a b)
|-  ^-  $~
?~  ran  ~
~&  "{tep} is: {<i.ran>}"                               ::< Infancy is: 0 1 2
$(ran t.ran)
::
%.  ["Infancy" [0 2]]
|=  {tep/tape {a/@ud b/@ud}}
%+  turn  (gulf a b)
|=  a/@ud
~&  "{tep} is: {<a>}"                                   ::< Infancy is: 0 1 2
~
::