How to select and split strings in column

Hi sorry for my inexperience I'm a little new to sql.

I have a varchar(150) column that is formatted like below

Column A

001204H3

0540F63 98300H1 

006578FD 08764GF2 006578FD

00088F64 0097G43 0987G43 0048F763

I need to select it so it is formatted like below.  As you can see the strings are different length so I can't split by length I have to split by the space between the strings.

Column AColumn BColumn CColumn D

001204H3NullNullNull

0540F63 98300H1NullNull

006578FD 08764GF2 006578FDNull

00088F64 0097G43 0987G43 0048F763

Any help is much appreciated.

Thanks very much.