In the given codes, the numbers are coded as shown :
 

1	5	7	8	9	2	3	4	6
E	G	K	P	T	A	L	U	R

i.e., 2 as A,
3 as L,
5 as G,
4 as U   and
9 as T.
So, 23549 is coded as ALGUT.