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\section{Blah}

Blah blah blah. Blah blah.\footnote{Blah blah.} Blah blah blah, blah blah.

\section{Blah blah blah}

Blah blah blah Blah etal, Blah blah et al, and Blah et al.

\subsection{Blah: blah}

Blah.\footnote{Blah blah --- blah? Blah.} Blah blah.

\subsubsection{Blah?}

Blah, i.e., blah.

\subsubsection{Blah!}

Blah, e.g., blah.

\subsection{Blah!!!}

Blah blah blah.


\section{Blah blah}

Blah.


\section{Blah and Blah}

Blah. Hence, blah. Next, blah blah.


\appendix

\section{Blah}

Blah blah blah blah blah blah blah blah blah blah blah blah blah.

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