\documentclass[a4paper,12ptj]{ltjsarticle}
\newcommand{\texfiles}{texfiles_sample}
\newcommand{\settings}{settings_sample}
\input{\texfiles/paper_info}
\input{\settings/packages}
\input{\settings/layout_abstract}
\begin{document}
\makeabstracttitle
\input{\texfiles/00.abstract}
\end{document}

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