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\newcommand{\flashcard}[1]{%
\setkeys{myvars}{#1}
\@ifundefined{c@\myvars@countername}}{
\newtotcounter{\myvars@countername}
}
\stepcounter{\myvars@countername}
\renewcommand{\groupcount}{\total{\myvars@countername}}
\renewcommand{\groupthis}{\arabic{\myvars@countername}}
\setkeys{myvars}{}
}