\begin{array}{l}
\begin{array}{ll}
1 & 2 \\
x & y \\
\end{array} \\
\begin{array}{ll}
1 & 2 \\
x & y \\
\end{array} \\
\begin{array}{ll}
1 & 2 \\
x & y \\
\end{array} \\
\end{array}
