\documentclass{report}

\begin{document}

\chapter {Chapter 1}

\section{Section 1.1}

\section{Section 1.2}

\section{Section 1.3}

\subsection{Subsection 1}

\chapter {Chapter 2}

\section{Section 2.1}

\subsection{Subsection 2.1}

\subsection{Subsection 2.2}

\input{leave.tex}

\end{document}
