[exit example]
 
 \input TeX4ht.sty
 \Preamble{html,sty}      \EndPreamble
 
 \List{1}
 \item        My heart is not haughty,
 \item        nor mine eyes lofty:
 \item        neither do I exercise
   \List{A}
     \item    myself in great matters,
     \item    or in things too
   \EndList
 \EndList
 
 \bye
[download source]
Non-simulated output:
mn-8.html
  1. My heart is not haughty,
  2. nor mine eyes lofty:
  3. neither do I exercise
    1. myself in great matters,
    2. or in things too