\tikzstyle{legend}=[font=\sffamily,rotate=90]
\tikzstyle{wp}=[rectangle,minimum height=7mm,draw=black,font=\sffamily]
\tikzstyle{wpred}=[wp,fill=red!50]
\tikzstyle{wpyellow}=[wp,fill=yellow]
\tikzstyle{wpgreen}=[wp,fill=green!50]
\tikzstyle{wpblue}=[wp,fill=blue!50]
\tikzstyle{NEED}=[line width=1.5pt,->]
\tikzstyle{influence}=[dotted,draw=gray,line width=1.25]
\ctikzfig{pert}

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