1.1 Subscrips and Superscripts (sub and super)

<..sub, sup, subsup..>
 \Configure{SUB}
    {\Send{BACK}
      {<.start msub base.>}<.msub sub.>}
    {<.close msub.>}
 \Configure{SUP}
    {\Send{BACK}
    {<.start msup base.>}<.msup super.>}
    {<.close msup.>}
 \Configure{SUBSUP}
    {\Send{BACK}
    {<.start msubsup base.>}<.msubsup sub.>}
    {<.msubsup sup.>}
    {<.close msubsup.>}
 \def\trap:base{{\HCode{}}}
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<..start msup base..>
 <span class="msup"><span class="mrow-base"\Hnewline>%
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<..msup super..>
 \HCode{</span><span class="mrow-super"\Hnewline
           >\add:description{begin-script}{\b:speak:subsup}}\trap:base
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<..close msup..>
 \HCode{\add:description{end-script}{\c:speak:subsup}</span></span\Hnewline>}%
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<..start msub base..>
 <span class="msub"><span class="mrow-base"\Hnewline>%
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<..msub sub..>
 \HCode{</span><span class="mrow-sub"\Hnewline
           >\add:description{begin-script}{\a:speak:subsup}}\trap:base
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<..close msub..>
 \HCode{\add:description{end-script}{\c:speak:subsup}</span></span\Hnewline>}%
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<..start msubsup base..>
 <span class="msubsup"><span class="mrow-base"\Hnewline>%
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<..msubsup sub..>
 \HCode{</span><span class="mrow-sub"\Hnewline
               >\add:description{begin-script}{\a:speak:subsup}}\trap:base
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<..msubsup sup..>
 \HCode{</span><span class="mrow-super"\Hnewline
       >\add:description{mid-script}{\b:speak:subsup}}\trap:base
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<..close msubsup..>
 \HCode{\add:description{end-script}{\c:speak:subsup}</span></span\Hnewline>}%
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<..configure html-speech-math tex4ht..>+
 \NewConfigure{speak:subsup}{3}
 \Configure{speak:subsup}
    {subscript}
    {superscript}
    {baseline}
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<..configure emacspeak tex4ht..>+
 \CssSpeech{.mrow-super{ pitch:9; pitch-range:4; richness:9; stress:9;}}
 \CssSpeech{.mrow-base{ pitch:9;  pitch-range:4; richness:5; stress:5;}}
 \CssSpeech{.mrow-sub{ pitch:9; pitch-range:0; richness:1; stress:1;}}
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