Find the difference of these matrices. If it is impossible, type "impossible".
$\begin{array}{l}
A=\left[\begin{array}{c}
5 \\
6 \\
-2
\end{array}\right] \quad A-B=\left[\begin{array}{c}
2 \\
[?]
\end{array}\right] \\
B=\left[\begin{array}{l}
3 \\
5 \\
3
\end{array}\right]
\end{array}$
$\begin{array}{l}
A=\left[\begin{array}{c}
5 \\
6 \\
-2
\end{array}\right] \quad A-B=\left[\begin{array}{c}
2 \\
[?]
\end{array}\right] \\
B=\left[\begin{array}{l}
3 \\
5 \\
3
\end{array}\right]
\end{array}$