\begin{Schunk}
\begin{Soutput}
   [,1] [,2] [,3] [,4]
M     1    0    0    0
N     0    1    0    0
S     0    0    1    0
SA    0    0    0    1
C    -1   -1   -1   -1
\end{Soutput}
\end{Schunk}
