!:
::::
  ::
:-  %say
|=  $:  {now/@da * bec/beak}
        *
    ==
=<  :-  %noun
    %hello
|%
::
++  ap
  |_  gen/twig
  ::
  ++  walk                                              ::  forward traverse
    |*  life/mold
    |=  $:  vit/life
            $=  mac
            $-  $:  twig
                    life
                    $-({? twig life} {twig life})
                ==
            (unit (pair twig life))
        ==
    ^-  {twig life}
    =/  use  &
    =<  apex 
    |%  
    ++  apex
      |-  ^-  {twig life}
      =*  aid  |=  {use/? gen/twig vit/life} 
               ^$(use use, gen gen, vit vit)
      =/  gun  ?:(use (mac gen vit aid) ~)
      ?^  gun  u.gun
      ?:  ?=(^ -.gen)
        %.(gen dubs)
      ?-  -.gen
        $$     (lead -.gen %.(+.gen noop))
        $base  (lead -.gen %.(+.gen noop))
        $bunt  (lead -.gen %.(+.gen expr))
        $bust  (lead -.gen %.(+.gen noop))
        $dbug  (lead -.gen %.(+.gen nexp))
        $hand  (lead -.gen %.(+.gen noop))
        $knit  (lead -.gen %.(+.gen (moto bark)))
        $leaf  (lead -.gen %.(+.gen noop))
        $limb  (lead -.gen %.(+.gen noop))
        $lost  (lead -.gen %.(+.gen expr))
        $rock  (lead -.gen %.(+.gen noop))
        $sand  (lead -.gen %.(+.gen noop))
        $tell  (lead -.gen %.(+.gen moar))
        $tune  (lead -.gen %.(+.gen tung))
        $wing  (lead -.gen %.(+.gen noop))
        $yell  (lead -.gen %.(+.gen moar))
        $claw  (lead -.gen %.(+.gen dubs))
        $shoe  (lead -.gen %.(+.gen expr))
        $bank  (lead -.gen %.(+.gen moar))
        $book  (lead -.gen %.(+.gen moar))
        $lamb  (lead -.gen %.(+.gen dubs))
        $bush  (lead -.gen %.(+.gen dubs))
        $pick  (lead -.gen %.(+.gen moar))
        $coat  (lead -.gen %.(+.gen nexp))
        $grow  (lead -.gen %.(+.gen expr))
        $door  (lead -.gen %.(+.gen (trio noop expr arms)))
        $door  (lead -.gen %.(+.gen (trio noop expr arms)))
        $gasp  (lead -.gen %.(+.gen (twin noop dubs)))
        $corp  (lead -.gen %.(+.gen (twin noop arms)))
        $trap  (lead -.gen %.(+.gen (twin noop expr)))
        $cork  (lead -.gen %.(+.gen (trio noop expr arms)))
        $loop  (lead -.gen %.(+.gen (twin noop expr)))
        $port  (lead -.gen %.(+.gen (twin noop dubs)))
        $gill  (lead -.gen %.(+.gen (twin noop dubs)))
        $gate  (lead -.gen %.(+.gen (twin noop dubs)))
        $tray  (lead -.gen %.(+.gen (twin noop expr)))
        $scon  (lead -.gen %.(+.gen dubs))
        $conq  (lead -.gen %.(+.gen (quad expr expr expr expr)))
        $cons  (lead -.gen %.(+.gen dubs))
        $cont  (lead -.gen %.(+.gen trey))
        $conl  (lead -.gen %.(+.gen moar))
        $conp  (lead -.gen %.(+.gen moar))
        $keep  (lead -.gen %.(+.gen (twin noop moan)))
        $lace  (lead -.gen %.(+.gen dubs))
        $call  (lead -.gen %.(+.gen (twin expr moar)))
        $bake  (lead -.gen %.(+.gen (trio noop expr moan)))
        $calq  (lead -.gen %.(+.gen (quad expr expr expr expr)))
        $calt  (lead -.gen %.(+.gen trey))
        $open  (lead -.gen %.(+.gen (trio noop expr moar)))
        $make  (lead -.gen %.(+.gen (twin noop moan)))
        $wish  (lead -.gen %.(+.gen dubs))
        $bump  (lead -.gen %.(+.gen expr))
        $nock  (lead -.gen %.(+.gen dubs))
        $same  (lead -.gen %.(+.gen dubs))
        $deep  (lead -.gen %.(+.gen expr))
        $iron  (lead -.gen %.(+.gen expr))
        $ward  (lead -.gen %.(+.gen dubs))
        $like  (lead -.gen %.(+.gen dubs))
        $cast  (lead -.gen %.(+.gen dubs))
        $zinc  (lead -.gen %.(+.gen expr))
        $burn  (lead -.gen %.(+.gen expr))
        $name  (lead -.gen %.(+.gen nexp))
        $lead  (lead -.gen %.(+.gen expr))
        $halo  (lead -.gen %.(+.gen nexp))
        $help  (lead -.gen %.(+.gen nexp))
        $show  (lead -.gen %.(+.gen dubs))
        $lurk  (lead -.gen %.(+.gen dubs))
        $crap  (lead -.gen %.(+.gen (raid expr)))
        $fast  (lead -.gen %.(+.gen (quad noop expr moan expr)))
        $funk  (lead -.gen %.(+.gen nexp))
        $thin  (lead -.gen %.(+.gen (twin toad expr)))
        $hint  (lead -.gen %.(+.gen (twin toad expr)))
        $poll  (lead -.gen %.(+.gen nexp))
        $memo  (lead -.gen %.(+.gen nexp))
        $dump  (lead -.gen %.(+.gen trip))
        $ddup  (lead -.gen %.(+.gen dubs))
        $warn  (lead -.gen %.(+.gen (quad noop expr expr expr)))
        $peep  (lead -.gen %.(+.gen dubs))
        $wad   (lead -.gen %.(+.gen (twin expr moar)))
        $nub   (lead -.gen %.(+.gen expr))
        $dip   (lead -.gen %.(+.gen (twin expr moar)))
        $fry   (lead -.gen %.(+.gen dubs))
        $new   (lead -.gen %.(+.gen dubs))
        $fix   (lead -.gen %.(+.gen (twin moan expr)))
        $var   (lead -.gen %.(+.gen (trio tora expr expr)))
        $rev   (lead -.gen %.(+.gen (trio tora expr expr)))
        $set   (lead -.gen %.(+.gen trip))
        $huh   (lead -.gen %.(+.gen (quad noop expr expr expr)))
        $rap   (lead -.gen %.(+.gen dubs))
        $nip   (lead -.gen %.(+.gen dubs))
        $per   (lead -.gen %.(+.gen dubs))
        $sip   (lead -.gen %.(+.gen (quad tora noop expr expr)))
        $pin   (lead -.gen %.(+.gen dubs))
        $tow   (lead -.gen %.(+.gen moar))
        $aka   (lead -.gen %.(+.gen trip))
        $use   (lead -.gen %.(+.gen dubs))
        $or    (lead -.gen %.(+.gen moar))
        $case  (lead -.gen %.(+.gen (twin noop (moto dubs))))
        $if    (lead -.gen %.(+.gen trey))
        $lest  (lead -.gen %.(+.gen trey))
        $ifcl  (lead -.gen %.(+.gen trip))
        $deny  (lead -.gen %.(+.gen dubs))
        $sure  (lead -.gen %.(+.gen dubs))
        $deft  (lead -.gen %.(+.gen (trio noop expr (moto dubs))))
        $and   (lead -.gen %.(+.gen moar))
        $ifat  (lead -.gen %.(+.gen trip))
        $ifno  (lead -.gen %.(+.gen trip))
        $fits  (lead -.gen %.(+.gen (twin expr noop)))
        $not   (lead -.gen %.(+.gen expr))
        $twig  (lead -.gen %.(+.gen dubs))
        $wrap  (lead -.gen %.(+.gen expr))
        $spit  (lead -.gen %.(+.gen dubs))
        $code  (lead -.gen %.(+.gen expr))
        $need  (lead -.gen %.(+.gen nexp))
        $fail  (lead -.gen %.(+.gen noop))
      ==
    ++  arms
      (raid (twin noop (raid (twin noop heel))))
    ::
    ++  bark 
      |=  wof/woof
      ?-(wof @ [wof vit], ^ (lead ~ (expr p.wof)))
    ::
    ++  dubs
      (twin expr expr)
    ::
    ++  expr
      |=  p/twig
      ^$(gen p)
    ::
    ++  heel
      |=  bud/foot
      ?-  -.bud
        $ash  =^(nex vit ^$(gen p.bud) [[%ash nex] vit])
        $elm  =^(nex vit ^$(gen p.bud) [[%elm nex] vit])
      ==
    ::
    ++  lead
      |*  {sem/@tas out/{* life}}
      [[sem -.out] +.out]
    ::
    ++  lede
      |*  {sem/@tas out/{* life}}
      [`twig`[sem -.out] +.out]
    ::
    ++  moan
      (moto nexp)
    ::
    ++  moar
      (moto expr)
    ::
    ++  moto
      |*  etc/$-(* {* life})
      |*  bud/*
      ^+  [bud vit]
      ?:  =(~ bud)  [bud vit]
      =^  heb  vit  (etc -.bud)
      =^  mor  vit  $(bud +.bud)
      [[heb mor] vit]
    ::
    ++  nexp
      (twin noop expr)
    ::
    ++  noop
      |*  bud/*
      [bud vit]
    ::
    ++  quad
      |*  $:  one/$-(* {* life})
              two/$-(* {* life})
              tri/$-(* {* life})
              qua/$-(* {* life})
          ==
      |*  bud/*
      =^  yal  vit  (one -.bud)
      =^  ves  vit  (two +<.bud)
      =^  jot  vit  (tri +>-.bud)
      =^  wip  vit  (qua +>+.bud)
      [[yal ves jot wip] vit]
    ::
    ++  raid
      |*  etc/$-(* {* life})
      |*  bud/*
      ^+  [bud vit]
      ?:  =(~ bud)  [bud vit]
      =^  lef  vit  $(bud +<.bud)
      =^  ryt  vit  $(bud +>.bud)
      =^  top  vit  (etc ->.bud)
      [[[-<.bud top] lef ryt] vit]
    ::
    ++  trey
      (trio expr expr expr)
    ::
    ++  trio
      |*  $:  one/$-(* {* life})
              two/$-(* {* life})
              tri/$-(* {* life})
          ==
      |*  bud/*
      =^  yal  vit  (one -.bud)
      =^  ves  vit  (two +<.bud)
      =^  jot  vit  (tri +>.bud)
      [[yal ves jot] vit]
    ::
    ++  trip
      (trio noop expr expr)
    ::
    ++  toad
      |=  bud/$@(term {p/term q/twig})
      ?@  bud  [bud vit]
      (lead p.bud (expr q.bud))
    ::
    ++  tora
      (twin noop twee)
    ::
    ++  tung
      |=  bud/{p/what q/$@(term tune)}
      ?@  q.bud  [bud vit]
      (lead p.bud %.(q.bud (twin (raid (twin noop twee)) (moto expr))))
    ::
    ++  twee
      |=  bud/(unit twig)
      ?~  bud  [~ vit]
      (lead ~ (expr u.bud))
    ::
    ++  twin
      |*  {one/$-(* {* life}) two/$-(* {* life})}
      |*  bud/*
      =^  yal  vit  (one -.bud)
      =^  ves  vit  (two +.bud)
      [[yal ves] vit]
    -- 
  ++  gi
    =|  whit
    =*  wit  -
    |%
    ++  gray
      ^-  ?
      |
      ::  on reflection, perhaps just obsessive linting
      ::
      ::  ?|  ?=(^ lab)
      ::      ?=(^ boy)
      ::      |-  ^-  ?
      ::      ?~  def  | 
      ::      |($(def l.def) $(def r.def) !(~(has in use) p.n.def))
      ::  ==
    ::
    ++  grad
      |=  $:  gen/twig 
              wit/whit 
              aid/$-({? twig whit} {twig whit})
          ==
      ^-  (unit (pair twig whit))
      =:  ^gen  gen
          ^wit  wit
        ==
      ?:  =([~ ~ ~ ~] wit)  `[gen wit]
      =<  apex
      |%
      ++  apex
        ^-  (unit (pair twig whit))
        =^  one  wit  prim
        =^  two  wit  senc(gen one)
        ?:  =(gen two) 
          ~
        `(aid & two wit)
      ::
      ::  resolve body and label issues
      ::
      ++  prim
        ^-  (pair twig whit)
        ?:  ?=(^ -.gen)  flam
        ?+  -.gen  flam
          $halo   flam
          $base   runk
          $leaf   runk
          $claw   runk
          $shoe   runk
          $bank   runk
          $book   runk
          $lamb   runk
          $bush   runk
          $pick   runk
          $coat   flam 
          $grow   runk
          $door   ((doof -.gen +>.gen) p.gen)
          $gasp   ((doof -.gen +>.gen) p.gen)
          $corp   ((doof -.gen +>.gen) p.gen)
          $trap   ((doof -.gen +>.gen) p.gen)
          $cork   ((doof -.gen +>.gen) p.gen)
          $loop   ((doof -.gen +>.gen) p.gen)
          $port   ((doof -.gen +>.gen) p.gen)
          $gill   ((doof -.gen +>.gen) p.gen)
          $gate   ((doof -.gen +>.gen) p.gen)
          $tray   ((doof -.gen +>.gen) p.gen)
        ==
      ::
      ::  resolve variable issues
      ::
      ++  senc
        ^-  (pair twig whit)
        ?:  ?=(^ -.gen)  flam
        ?+  -.gen  flam
          $name  ((helk -.gen +>.gen) p.gen)
          $coat  ((helk -.gen +>.gen) p.gen)
          $var   ((hulp -.gen +>.gen) p.gen)
          $rev   ((hulp -.gen +>.gen) p.gen)
          $sip   ((hulp -.gen +>.gen) p.gen)
          $aka   ((humm -.gen +>.gen) p.gen)
        ==
      ::
      ++  flam  [gen wit]
      ++  grif
        |=  {cog/term wat/what}
        ^-  {what whit}
        ?:  =(~ def)
          ?~  boy  [wat wit]
          [boy wit(boy ~)]
        =+  yeb=(~(get by def) cog)
        ?~  yeb  [wat wit]
        [`u.yeb wit(use (~(put in use) cog))]
      ::
      ++  doof
        |*  {pif/@tas suf/*}
        |=  pac/chap
        ^-  (pair twig whit)
        :_  wit(lab ~, boy ~)
        =-  [pif - suf]
        ^-  chap
        :-  ?~(lab p.pac [u.lab ~])
            ?~(boy q.pac boy)
      ::
      ++  helk
        |*  {pif/@tas suf/*}
        |=  got/toga
        ^-  (pair twig whit)
        =^  gef  wit  (tong got)
        [[pif gef suf] wit]
      ::
      ++  hulp
        |*  {pif/@tas suf/*}
        |=  hot/toro
        ^-  (pair twig whit)
        =^  tog  wit  (tong p.hot)
        [[pif [tog q.hot] suf] wit] 
      ::
      ++  humm
        |*  {pif/@tas suf/*}
        |=  {wat/what cog/term}
        ^-  (pair twig whit)
        =^  taw  wit  (grif cog wat)
        [[pif [taw cog] suf] wit] 
      ::
      ++  runk
        ^-  (pair twig whit)
        ?~  boy  flam
        [[%halo boy gen] wit(boy ~)]
      ::
      ++  tong
        |=  got/toga
        ^-  {toga whit}
        ?@  got
          =^  wat  wit  (grif got ~)
          ?~  wat  [got wit]
          [[%1 [wat got] [%0 ~]] wit]
        ?-  -.got
          $0  [got wit]
          $1  =^  wat  wit  (grif q.p.got p.p.got)
              =^  sub  wit  $(got q.got)
              [[%1 [wat q.p.got] sub] wit]
          $2  =^  one  wit  $(got p.got)
              =^  two  wit  $(got q.got)
              [[%2 one two] wit]
        ==
      --
    ::
    ++  graf
      ::  ^-  (unit twig)
      ::  =^  nex  wit  ((walk whit) wit grad)
      ::  ?:(gray ~ `nex)
      =^  nex  wit  ((walk whit) wit grad)
      nex
    --
  --
--