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\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{xcolor}
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\begin{document}
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\draw (262.67,214) node [anchor=north west][inner sep=0.75pt] [rotate=-90] [align=left] {$\displaystyle \dotsc $};
\draw (314.42,218.9) node [anchor=north west][inner sep=0.75pt] [rotate=-136] [align=left] {$\displaystyle \dotsc $};
\draw (317.67,274.2) node [anchor=north west][inner sep=0.75pt] [rotate=-180] [align=left] {$\displaystyle \dotsc $};
\draw (317.67,186.2) node [anchor=north west][inner sep=0.75pt] [rotate=-180] [align=left] {$\displaystyle \dotsc $};
\draw (351.67,214) node [anchor=north west][inner sep=0.75pt] [rotate=-90] [align=left] {$\displaystyle \dotsc $};
\draw (222.47,262.93) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {$\displaystyle \{a_{0,0}\}$};
\draw (354.27,262.33) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {$\displaystyle \{a_{n,0}\}$};
\draw (221.47,232.53) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {$\displaystyle \{a_{0,1}\}$};
\draw (217.67,176.53) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {$\displaystyle \{a_{0,m}\}$};
\draw (354.27,176.13) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {$\displaystyle \{a_{n,m}\}$};
\draw (354.27,230.93) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {$\displaystyle \{a_{n,1}\}$};
\draw (255.27,274.93) node [anchor=north west][inner sep=0.75pt] [align=left] {$\displaystyle o$};
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\end{document}