Sorting characters with array formula

Word in A1: ZYX

Following formula creates an soting characters with array of {"X","Y","Z"}

{=TRANSPOSE(CHAR(SMALL(CODE(MID(A1,ROW(INDIRECT("1:"&LEN(A1))),1)),ROW(INDIRECT("1:"&LEN(A1))))))}

How to concatenate all orders in this array to be a word of XYZ ? I can not figure out the answer. Any other formulas to sort alphabet in each cell?

For example:

Hello ----> olleH
Somkiat -----> taikmoS
Done -----> enoD

Thanks,
Somkiat