(1111)\left(\begin{array}{ll}1 & 1 \\1 & 1\end{array}\right)(1111)
(1001)\left(\begin{array}{ll}1 & 0 \\0 & 1\end{array}\right)(1001)
(0111)\left(\begin{array}{ll}0 & 1 \\1 & 1\end{array}\right)(0111)
(0001)\left(\begin{array}{ll}0 & 0 \\0 & 1\end{array}\right)(0001)