space and tab as Delimiter

[Starlette]

How can you handle files which are delimted by tab and single spaces?
[stanza]
FIELDS = "field1", "field2"
DELIMS=" "
DELIMS="\t"

so the log is like

field1 [tab] field1 [tab] field3 field4 etc

[Starlette]

multiple_delims] DELIMS = "|;", "=:"
The above example extracts key-value pairs which are separated by '|' or ';'.
while the key is delimited from value by '=' or ':'.