\glossarysection[\glossarytoctitle]{\glossarytitle}\glossarypreamble
\begin{theglossary}\glossaryheader
\glsgroupheading{C}\relax \glsresetentrylist %
\glossentry{computer}{\glossaryentrynumbers{\relax
\setentrycounter[]{page}\glsnumberformat{37}}}\glsgroupskip
\glsgroupheading{P}\relax \glsresetentrylist %
\glossentry{pi}{\glossaryentrynumbers{\relax
\setentrycounter[]{page}\glsnumberformat{21}\delimN
\setentrycounter[]{page}\glsnumberformat{37}}}%
\end{theglossary}\glossarypostamble
