\documentclass[10pt]{report}
% this is a report
\pagestyle{headings}
\begin{document}
\title{title}
\author{author}
\maketitle
\tableofcontents
\newpage
\flushleft
\begin{abstract}
Fusce lobortis luctus risus, in consequat arcu porttitor quis.
Curabitur interdum ligula et dolor commodo pulvinar.
\end{abstract}
Etiam vitae dolor augue
\chapter{chapter1 \"a \"A \"u \"U \"o \"O}
\section{section1 \"a \"A \"u \"U \"o \"O}
Lorem ipsum dolor sit amet, \ldots
\begin{enumerate}
\item consectetur adipiscing elit.
\item Morbi lobortis purus non enim
\begin{enumerate}
\item Aliquam
\begin{enumerate}
\item turpis
\end{enumerate}
\end{enumerate}
\item leo
\item[5.] Quisque lobortis
\item [6.] Duis sed lacus lectus,
\end{enumerate}
Cras pharetra dui quis
% this is the end of an enumerated list
fringilla auctor interdum tortor aliquet.
\subsection{subsection1 \"a \"A \"u \"U \"o \"O}
Nunc \textbf{feugiat} condimentum\\
\subsection{subsection2}
% this is a subsection
\begin{itemize}
\item \textsf{urna} nec consectetur.
\begin{description}
\end{description}
\end{itemize}
Aliquam arcu augue,\newline
Aliquam arcu augue,\newline
\subsubsection{subsubsection1}
\begin{description}
\item[dapibus] \# \$ \% \& \_ \{ \} sed
\end{description}
\subsubsection{subsubsection2}
\begin{itemize}
\item vestibulum sed, \"a \"A \"u \"U \"o \"O
\end{itemize}
\begin{itemize}
\item[-] item 1
\end{itemize}
Nam id
\chapter{chapter2}
\section{section2}
sodales
sodales
\begin{verbatim}
eget
enim.
\end{verbatim}
Duis arcu sapien
\subsection{subsection1}
\verb+Proin+
\verb*+Proin+
\section{section3}
quis \emph{elit}
\begin{itemize}
\item Quisque vulputate
Curabitur in neque
Donec molestie
\# \$ \% \& \_ \{ \}
\item Etiam ac mauris
\begin{itemize}
\item sem sit amet
\item ligula rutrum vel
\end{itemize}
\item eu bibendum leo
\end{itemize}
\begin{verbatim}
.'.
'..cll. .lxxdxl'
',:clkx. .;OK0ko;ll;
okoddc.oOo,;l::'.;c;
xoldo'dkl'..':;;:,:;:
lKo,c'lkO,.,,:;,. ;;lo.
:xl,;dxKlc;'odddxKd:;c
.,.kKOoxoc;x0d.xx,;:
d0o 00d l0. ,O;.
ox ;lc. ;c o:
:: .,' .. c'
; .c,. ,
.. .'.', .l.
;'. .,
\end{verbatim}
\begin{description}
\end{description}
\end{document}