$$\left. \begin{array} { l } { a = 3 , n = 8 S = 1927 } \\ { l = 28 , S = 144 } \\ { \text { ( x ) 636 z i t r i t e n t r e i f f r i r t . \right.$$
$a=3$
$n=8S$
$S\in \mathrm{R}$
