This is LuaTeX, Version beta-0.76.0-2020040104 (rev 4627)  (INITEX)  8 NOV 2021 19:32
 restricted \write18 enabled.
**luatex.ini
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(/usr/share/texlive/texmf/tex/generic/config/luatexiniconfig.tex)
(/usr/share/texlive/texmf/tex/generic/config/luatex-unicode-letters.tex
loading Unicode properties)
(/usr/share/texlive/texmf-dist/tex/plain/config/pdfetex.ini
(/usr/share/texlive/texmf/tex/generic/config/pdftexconfig.tex)
(/usr/share/texlive/texmf-dist/tex/luatex/hyph-utf8/etex.src
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Preloading the plain format: codes, registers,
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macros,
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 math definitions,
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[skipping from \patterns to end-of-file...]))
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(/usr/share/texlive/texmf-dist/tex/plain/etex/etexdefs.lib
Skipping module "grouptypes"; Loading module "interactionmodes";
Skipping module "nodetypes"; Skipping module "iftypes";)
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luatex-hyphen: using data file: /usr/share/texlive/texmf/tex/generic/config/lang
uage.dat.lua
(/usr/share/texlive/texmf/tex/generic/hyphen/hyphen.tex)
\lang@bulgarian=\language1
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)
Augmenting the Plain TeX definitions: \tracingall;
Adding new e-TeX definitions: \eTeX, \loggingall, \tracingnone,
register allocation;
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 extended register allocation; 
Recycling: \addlanguage, \@nswer (not defined), \@sk, \b@dresponsetrue,
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Retaining: \et@xerr, \et@xinput, \et@xlibhdr, \et@xmsg, \et@xtoks, \et@xwarn,
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\etexstatus, \module, \uselanguage, \r@tain, \r@cycle,)
(/usr/share/texlive/texmf-dist/tex/plain/config/pdftexmagfix.tex) ) )
Beginning to dump on file luatex.fmt
 (format=luatex 2021.11.8)
3110 strings using 9738 bytes
69031 memory locations dumped; current usage is 103&7811
1716 multiletter control sequences
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\font\preloaded=manfnt
50 preloaded fonts
0 words of pdf memory
0 indirect objects
No pages of output.

PDF statistics: 0 PDF objects out of 1000 (max. 8388607)
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 1 words of extra memory for PDF output out of 10000 (max. 10000000)