$\begin{array}{cccc|c}
x_1 & x_2 & x_1' & x_2' & \to \\\hline
 0  &  0  &  0   &  0   &  1  \\
 0  &  0  &  0   &  1   &  0  \\
 0  &  0  &  1   &  0   &  1  \\
 0  &  0  &  1   &  1   &  0  \\\hline
 0  &  1  &  0   &  0   &  1  \\
 0  &  1  &  0   &  1   &  0  \\
 0  &  1  &  1   &  0   &  0  \\
 0  &  1  &  1   &  1   &  0  \\\hline
 1  &  0  &  0   &  0   &  0  \\
 1  &  0  &  0   &  1   &  1  \\
 1  &  0  &  1   &  0   &  0  \\
 1  &  0  &  1   &  1   &  0  \\\hline
 1  &  1  &  0   &  0   &  0  \\
 1  &  1  &  0   &  1   &  0  \\
 1  &  1  &  1   &  0   &  0  \\
 1  &  1  &  1   &  1   &  0  \\
\end{array}$
\qquad\qquad
$\begin{array}{cccc|c}
x_1 & x_1' & x_2 & x_2' & \to \\\hline
 0  &  0  &  0   &  0   &  1  \\
 0  &  0  &  0   &  1   &  0  \\
 0  &  0  &  1   &  0   &  1  \\
 0  &  0  &  1   &  1   &  0  \\\hline
 0  &  1  &  0   &  0   &  1  \\
 0  &  1  &  0   &  1   &  0  \\
 0  &  1  &  1   &  0   &  0  \\
 0  &  1  &  1   &  1   &  0  \\\hline
 1  &  0  &  0   &  0   &  0  \\
 1  &  0  &  0   &  1   &  1  \\
 1  &  0  &  1   &  0   &  0  \\
 1  &  0  &  1   &  1   &  0  \\\hline
 1  &  1  &  0   &  0   &  0  \\
 1  &  1  &  0   &  1   &  0  \\
 1  &  1  &  1   &  0   &  0  \\
 1  &  1  &  1   &  1   &  0  \\
\end{array}$