\documentclass[cours]{tb}

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\author{F.Dagnat \& J.Mallet}
\title[le titre court]{Some very very long silly title to test}
\subtitle{A small subtitle}
\begin{document}
\begin{frame}[title]
  \titlepage
\end{frame}

\begin{frame}{Plan}
\tableofcontents
\end{frame}

\section{Pipo 1}
\label{sec:pipo-1}

\begin{frame}[background=page_1]
\end{frame}
\begin{frame}[background=page_1]{Le titre peut être très très long inutilement {\color{black}et alors attention à la fin}}
  Du texte sans item
  \begin{itemize}
  \item tutu est une très grande phrase qui va finir par dépasser
    \begin{itemize}
    \item   i \structure{toto en structure}
    \item a \textbullet \alert{toto en alert}
      \begin{itemize}
      \item tititititititiititit
      \end{itemize}
    \end{itemize} 
  \item titi
  \item tata
  \end{itemize}
\end{frame}
\section{Pipo 2}
\begin{frame}[background=title]
  tutu
\end{frame}
\section{Pipo 3}
\begin{frame}[title color=VertClair,background=page_2]{Des blocs}
  \begin{block}{Un titre}
    djfkhgdj dj fjshdkjfh kjdfh ljkdjfbv jkldbfbkjdbv jkwbkjdbf
    jvbwkjdbv kjwbskdbv jklswb dvkjvbkjdb vkjwbdkjfbvwkjsd jblkj
  \end{block}
  \begin{alertblock}{Un titre}
    djfkhgdj dj fjshdkjfh kjdfh ljkdjfbv jkldbfbkjdbv jkwbkjdbf
    jvbwkjdbv kjwbskdbv jklswb dvkjvbkjdb vkjwbdkjfb jblkj
  \end{alertblock}
  \begin{exampleblock}{Un titre}
    djfkhgdj dj fjshdkjfh kjdfh ljkdjfbv jkldbfbkjdbv jkwbkjdbf
    jvbwkjdbv kjwbskdbv jklswb dvkjvbkjdb vkjwbdkjfbvwkjsdbjvljkbkljd
  \end{exampleblock}
\end{frame}
\begin{frame}{Des blocs}
  \withoutshadow
  \begin{block}{Un titre}
    djfkhgdj dj fjshdkjfh kjdfh ljkdjfbv jkldbfbkjdbv jkwbkjdbf
    jvbwkjdbv kjwbskdbv jklswb dvkjvbkjdb vkjwbdkjfbvwkjsd jblkj
  \end{block}
  \begin{alertblock}{Un titre}
    djfkhgdj dj fjshdkjfh kjdfh ljkdjfbv jkldbfbkjdbv jkwbkjdbf
    jvbwkjdbv kjwbskdbv jklswb dvkjvbkjdb vkjwbdkjfb jblkj
  \end{alertblock}
  \begin{exampleblock}{Un titre}
    djfkhgdj dj fjshdkjfh kjdfh ljkdjfbv jkldbfbkjdbv jkwbkjdbf
    jvbwkjdbv kjwbskdbv jklswb dvkjvbkjdb vkjwbdkjfbvwkjsdbjvljkbkljd
  \end{exampleblock}
\end{frame}
\end{document}

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