\glossarysection[\glossarytoctitle]{\glossarytitle}\glossarypreamble
\begin{theglossary}\glossaryheader
\glsgroupheading{F}\relax \glsresetentrylist %
\glossentry{sy:F}{\glossaryentrynumbers{\relax 
		\setentrycounter[]{page}\glsnumberformat{xiv}\delimN 
		\setentrycounter[]{page}\glsnumberformat{xvi}}}\glsgroupskip
\glsgroupheading{X}\relax \glsresetentrylist %
\glossentry{sy:X}{\glossaryentrynumbers{\relax 
		\setentrycounter[]{page}\glsnumberformat{xiv}\delimN 
		\setentrycounter[]{page}\glsnumberformat{xvi}}}%
\end{theglossary}\glossarypostamble