In that case you can use:
=TRIM(MID(SUBSTITUTE(","&A1,",",REPT(" ",99)),3*99,99))&" "&TRIM(MID(SUBSTITUTE(","&A1,",",REPT(" ",99)),2*99,99))&" "&TRIM(MID(SUBSTITUTE(","&A1,",",REPT(" ",99)),1*99,99))
It looks longer but it is just the same formula i.e. TRIM(MID(SUBSTITUTE(","&A1,",",REPT("...