[25]\left[\begin{array}{ll}2 & 5\end{array}\right][25]
[21]\left[\begin{array}{l}2 \\1\end{array}\right][21]
[25]\left[\begin{array}{l}2 \\5\end{array}\right][25]
[21]\left[\begin{array}{ll}2 & 1\end{array}\right][21]