\begin{Schunk}
\begin{Sinput}
 contrasts(Chile$region)
\end{Sinput}
\begin{Soutput}
   M N S SA
C  0 0 0  0
M  1 0 0  0
N  0 1 0  0
S  0 0 1  0
SA 0 0 0  1
\end{Soutput}
\end{Schunk}
