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\begin{document}
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\draw (-7.69,1.7) node[anchor=north west] {$\bigcup$};
\draw (-9.66,-3.01) node[anchor=north west] {$L'_{3}$};
\draw [color=sqsqsq](4.31,1.7) node[anchor=north west] {$\longmapsto$};
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\draw (10.17,0.95) node[anchor=north west] {$\bigcup$};
\draw (-4.53,-3.25) node[anchor=north west] {$C_{11}$};
\draw (1.73,-3.31) node[anchor=north west] {$C_{8}$};
\draw (8.46,-3.17) node[anchor=north west] {$L'_{3}$};
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\draw (-8.04,3.83) node[anchor=north west] {$u$};
\draw (9.45,0) node[anchor=north west] {$v'$};
\draw (9.98,3.24) node[anchor=north west] {$u'$};
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