/usr/include/hfst/parsers/ is in libhfst-dev 3.13.0~r3461-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/hfst/parsers/Alphabet.h
/usr/include/hfst/parsers/CommandLine.h
/usr/include/hfst/parsers/ConflictResolvingLeftArrowRule.h
/usr/include/hfst/parsers/ConflictResolvingRightArrowRule.h
/usr/include/hfst/parsers/ConstContainerIterator.h
/usr/include/hfst/parsers/HfstTwolcDefs.h
/usr/include/hfst/parsers/InputReader.h
/usr/include/hfst/parsers/LeftArrowRule.h
/usr/include/hfst/parsers/LeftArrowRuleContainer.h
/usr/include/hfst/parsers/LeftRestrictionArrowRule.h
/usr/include/hfst/parsers/LexcCompiler.h
/usr/include/hfst/parsers/MatchedConstContainerIterator.h
/usr/include/hfst/parsers/MixedConstContainerIterator.h
/usr/include/hfst/parsers/OtherSymbolTransducer.h
/usr/include/hfst/parsers/PmatchCompiler.h
/usr/include/hfst/parsers/RightArrowRule.h
/usr/include/hfst/parsers/RightArrowRuleContainer.h
/usr/include/hfst/parsers/Rule.h
/usr/include/hfst/parsers/RuleContainer.h
/usr/include/hfst/parsers/RuleSymbolVector.h
/usr/include/hfst/parsers/RuleVariables.h
/usr/include/hfst/parsers/RuleVariablesConstIterator.h
/usr/include/hfst/parsers/SfstAlphabet.h
/usr/include/hfst/parsers/SfstBasic.h
/usr/include/hfst/parsers/SfstCompiler.h
/usr/include/hfst/parsers/SfstUtf8.h
/usr/include/hfst/parsers/TwolCGrammar.h
/usr/include/hfst/parsers/TwolcCompiler.h
/usr/include/hfst/parsers/VariableBlock.h
/usr/include/hfst/parsers/VariableBlockContainer.h
/usr/include/hfst/parsers/VariableContainer.h
/usr/include/hfst/parsers/VariableContainerBase.h
/usr/include/hfst/parsers/VariableDefs.h
/usr/include/hfst/parsers/VariableValueIterator.h
/usr/include/hfst/parsers/VariableValues.h
/usr/include/hfst/parsers/XfstCompiler.h
/usr/include/hfst/parsers/XreCompiler.h
/usr/include/hfst/parsers/grammar_defs.h
/usr/include/hfst/parsers/lexc-utils.h
/usr/include/hfst/parsers/pmatch_utils.h
/usr/include/hfst/parsers/string_manipulation.h
/usr/include/hfst/parsers/xfst-utils.h
/usr/include/hfst/parsers/xfst_help_message.h
/usr/include/hfst/parsers/xre_utils.h