/usr/include/regina-normal/subcomplex/ is in regina-normal-dev 5.1-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/regina-normal/subcomplex/augtrisolidtorus.h
/usr/include/regina-normal/subcomplex/blockedsfs.h
/usr/include/regina-normal/subcomplex/blockedsfsloop.h
/usr/include/regina-normal/subcomplex/blockedsfspair.h
/usr/include/regina-normal/subcomplex/blockedsfstriple.h
/usr/include/regina-normal/subcomplex/l31pillow.h
/usr/include/regina-normal/subcomplex/layeredchain.h
/usr/include/regina-normal/subcomplex/layeredchainpair.h
/usr/include/regina-normal/subcomplex/layeredlensspace.h
/usr/include/regina-normal/subcomplex/layeredloop.h
/usr/include/regina-normal/subcomplex/layeredsolidtorus.h
/usr/include/regina-normal/subcomplex/layeredtorusbundle.h
/usr/include/regina-normal/subcomplex/layering.h
/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
/usr/include/regina-normal/subcomplex/pillowtwosphere.h
/usr/include/regina-normal/subcomplex/pluggedtorusbundle.h
/usr/include/regina-normal/subcomplex/plugtrisolidtorus.h
/usr/include/regina-normal/subcomplex/satannulus.h
/usr/include/regina-normal/subcomplex/satblock.h
/usr/include/regina-normal/subcomplex/satblockstarter.h
/usr/include/regina-normal/subcomplex/satblocktypes.h
/usr/include/regina-normal/subcomplex/satregion.h
/usr/include/regina-normal/subcomplex/snappeacensustri.h
/usr/include/regina-normal/subcomplex/snappedball.h
/usr/include/regina-normal/subcomplex/snappedtwosphere.h
/usr/include/regina-normal/subcomplex/spiralsolidtorus.h
/usr/include/regina-normal/subcomplex/standardtri.h
/usr/include/regina-normal/subcomplex/trisolidtorus.h
/usr/include/regina-normal/subcomplex/trivialtri.h
/usr/include/regina-normal/subcomplex/txicore.h