$ perl -MO=Concise -e'@a = ($x..$y)'
...
-        <1> ex-list lK ->7
3           <0> pushmark s ->4
-           <1> null lKP/1 ->-
6              <1> flop lK ->7
d                 <1> flip[t6] lK ->7
4                    <|> range(other->5)[t5] lK/1 ->c
-                       <1> ex-rv2sv sK/1 ->d
c                          <#> gvsv[*x] s ->d
-                       <1> ex-rv2sv sK/1 ->6
5                          <#> gvsv[*y] s ->6
...