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\item \lect Use the DPLL algorithm with \textit{Boolean Constrain Propagation} and \textit{Pure Literals} (\emph{without} clause learning) to determine whether or not the set of clauses given is satisfiable. Decide variables in alphabetical order starting with the \textit{positive} phase. If the set of clauses resulted in \texttt{SAT}, give a satisfying model.
\begin{dpllCNFInput}
\item $(\lnot a \lor b)$
\item $(\lnot b \lor c)$
\item $(\lnot c \lor d)$
\item $(\lnot d \lor e)$
\item $(\lnot e \lor \lnot a)$
\end{dpllCNFInput}