\glossarysection[\glossarytoctitle]{\glossarytitle}\glossarypreamble
\begin{theglossary}\glossaryheader
\glsgroupheading{A}\relax \glsresetentrylist %
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\glsgroupheading{M}\relax \glsresetentrylist %
\glossentry{a:MPG}{\glossaryentrynumbers{\relax 
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\glossentry{a:MS}{\glossaryentrynumbers{\relax 
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\glsgroupheading{T}\relax \glsresetentrylist %
\glossentry{a:Tab}{\glossaryentrynumbers{\relax 
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\end{theglossary}\glossarypostamble