\documentclass{article}

\usepackage{lipsum}

\title{2 Level Heading Test}
\author{krasjet}
\date{}

\begin{document}
\maketitle

\section{Section One}

\lipsum[2-4]

\section{Section Two}

\lipsum[2-5]

\subsection{Subsection Two.One}
\lipsum[2-5]

\section{Section Three, with looong loooong looong title}

\lipsum[1-2]

\subsection{Subsection Three.One, with even loooooooooooonger title, and
probably even more}
\lipsum[2-5]

\subsection{Subsection Three.Two}
\lipsum[1-1]

\subsection{Subsection Three.Three}
\lipsum[2-3]

\section{The End}

\lipsum[2-5]

\end{document}
