/usr/include/regina-normal/subcomplex/ is in regina-normal-dev 4.96-2.1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/regina-normal/subcomplex/naugtrisolidtorus.h
/usr/include/regina-normal/subcomplex/nblockedsfs.h
/usr/include/regina-normal/subcomplex/nblockedsfsloop.h
/usr/include/regina-normal/subcomplex/nblockedsfspair.h
/usr/include/regina-normal/subcomplex/nblockedsfstriple.h
/usr/include/regina-normal/subcomplex/nl31pillow.h
/usr/include/regina-normal/subcomplex/nlayeredchain.h
/usr/include/regina-normal/subcomplex/nlayeredchainpair.h
/usr/include/regina-normal/subcomplex/nlayeredlensspace.h
/usr/include/regina-normal/subcomplex/nlayeredloop.h
/usr/include/regina-normal/subcomplex/nlayeredsolidtorus.h
/usr/include/regina-normal/subcomplex/nlayeredsurfacebundle.h
/usr/include/regina-normal/subcomplex/nlayering.h
/usr/include/regina-normal/subcomplex/npillowtwosphere.h
/usr/include/regina-normal/subcomplex/npluggedtorusbundle.h
/usr/include/regina-normal/subcomplex/nplugtrisolidtorus.h
/usr/include/regina-normal/subcomplex/nsatannulus.h
/usr/include/regina-normal/subcomplex/nsatblock.h
/usr/include/regina-normal/subcomplex/nsatblockstarter.h
/usr/include/regina-normal/subcomplex/nsatblocktypes.h
/usr/include/regina-normal/subcomplex/nsatregion.h
/usr/include/regina-normal/subcomplex/nsnappeacensustri.h
/usr/include/regina-normal/subcomplex/nsnappedball.h
/usr/include/regina-normal/subcomplex/nsnappedtwosphere.h
/usr/include/regina-normal/subcomplex/nspiralsolidtorus.h
/usr/include/regina-normal/subcomplex/nstandardtri.h
/usr/include/regina-normal/subcomplex/ntrisolidtorus.h
/usr/include/regina-normal/subcomplex/ntrivialtri.h
/usr/include/regina-normal/subcomplex/ntxicore.h