I have an imported data with gaps of unequal size. To convert them I need to
add a special character in this case.

What piece of code could replace a gap of 3 or more spaces with a pipe
character "|".

In other words, data like

Name Region Rate
Name 1 Region x Rate x
Name 2 Region x Rate x
Name 3 Region x Rate x
Name 4 Region x Rate x
Name 5 Region x Rate x

could be converted to:

Name Region Rate
Name 1|Region x|Rate x
Name 2|Region x|Rate x
Name 3|Region x|Rate x
Name 4|Region x|Rate x
Name 5|Region x|Rate x

because only the second row and onwards contain gaps of 3 more spaces and
only a single "|" is inserted.

Thanx in advance.

--
Best Regards,

Faraz