'sp' in countw function

[Ronein]

Hello

What is the meaning of 'sp'?? It is related to delimiter but what exectly

 words = countw(string,'sp');

[shahparth260]

S or s -adds space characters (blank, horizontal tab, vertical tab, carriage return, line feed, and form feed) to the list of characters.

P or p-adds punctuation marks to the list of characters

[Kurt_Bremser]

Maxim 1: read the documentation.